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The oldest climate story isn’t about a wildfire or a hurricane, a heat wave or a drought. It’s about a flood.
“The deluge is terrifying not just for its destructive capacity but also for the way it undoes all that has been accomplished, brings us back to the fathomless chaos of beginning,” The New Yorker’s Avi Steinberg writes of this most primordial human fear, the story of which has been echoed across cultures and religions from the Mesopotamian Epic of Gilgamesh to the Bible’s Old Testament to the Ancient Greek Deucalion Myth to stories told by Native peoples across North America. It might also be humankind’s oldest cautionary tale: When the rain starts and the waters begin to rise, pay attention.
In the United States, floods are the deadliest extreme weather phenomenon after heat waves. In particular, flash floods — which the National Oceanic and Atmospheric Administration distinguishes as flooding that “begins within 6 hours, and often within 3 hours, of ... heavy rainfall” — often take people by surprise, or are dangerously underestimated.
With Hurricane Hilary threatening to dump potentially a year’s worth of rain on parts of the southwestern United States in the span of 72 hours, learning how to react to rising waters ahead of time can be life-saving. This is what you need to know.
Unlike learning your personal wildfire risk, which is relatively easy, it can be frustrating to try to figure out the flood risk of your home.
FEMA publishes flood maps (you can search by your address here), but the shading key can be hard to make out and I had difficulty getting the images to load. I had my best luck navigating to this version of the map, clicking on the location I was interested in, then clicking to the second page of the pop-up information, where you will see “Flood Hazard Zones” followed by a letter. The letters B, C, and X designate moderate- to low-risk flood areas (though the risk in these locations is not non-existent!) while high-risk areas are marked with A or V.
An example of where to find your individual flood hazard zone on the FEMA flood map.FEMA
Personally, I preferred the clear information laid out at RiskFactor.com. The website told me my neighborhood’s risk (I live by the river in New York City, so mine is “moderate”) and the number of properties in the area that have a “greater than ... 26% chance of being severely affected by flooding over the next 30 years” (for my neighborhood, 16%!). The website will even estimate the “max depth of flooding” of a specific home or building for this year and in the next 30 years.
If you are in a moderate- to high-risk area on either map, you should take steps to prepare for a flash flood. Even if you score lower, you might want to consider preparing your house because minimal risk doesn’t denote zero risk.
Either way, you should read the below section about “what to do if you’re in a car during a flash flood,” since such a scenario can happen to anyone.
You don’t have to wait for a flash flood warning to begin to prepare for the worst. But if you’re in a situation where you can anticipate flooding — like much of Southern California, Nevada, and southwestern Arizona can right now — you should prepare ahead of time to run errands so you won’t need to leave the house during the storm. Keep in mind, the best way to stay safe during a flash flood is to not encounter the flood in the first place.
Make sure you have enough food for several days, as well as enough pet food for your animals. Also be sure to pick up any prescriptions or medications you might need. Anticipate any other reasons why you might need to leave your home and try to prevent or limit them ahead of time.
Confirm that the contents of your “go bag” or emergency evacuation kit are up-to-date. Here’s a generic checklist of what should go in it, as well as a version in Spanish.
Check the batteries in your flashlights and charge backup batteries for electronics like cell phones, in case the power goes out.
Clean up your yard if you have time; secure outdoor furniture so it doesn’t get blown around.
Prepare electricity-free entertainment options (now is the time to start brushing up on gin rummy).
Check on neighbors or relatives who might not be aware of the coming storm or have made preparations yet.
I can't believe I have to write this, but absolutely do not order Doordash or Uber Eats or food or products from any other courier service during flash flood conditions. Doing so puts other people in direct danger. Your ramen craving can be satisfied later.
Never wait out a storm in a basement or an apartment that is below ground level if you live in an area with moderate to high flood risk; move to a higher floor or find a different location to shelter in. Even if your home or basement has been okay in previous rainstorms, major flood events can overwhelm city sewer systems and back up water into areas it hasn’t reached before. As Reza Khanbilvardi, a professor of civil engineering and hydrology at City College of New York, told Gothamist after Hurricane Ida killed dozens in New York, New Jersey, and Connecticut in 2021, “Apartments in cellars and basements can be death traps.” Paved urban areas can be especially dangerous in these conditions.
Follow potential evacuation alerts on your phone or on a radio (yes, they still exist!). Sign up for alerts now if you haven’t already.
Seal your important documents in a gallon-size freezer bag or other waterproof bag if you anticipate needing to evacuate, The New York Times suggests.
Unplug electronics and move any valuables to higher floors or locations if you have time to prepare for an evacuation.
If water enters your home, evacuate immediately with your go bag. Do not wait or try to retrieve any additional items. One of the most common ways people get hurt during flash floods is by waiting too long to evacuate. Use your best judgment — if it feels safer to climb to a higher floor than to try to drive to higher ground, do so, but avoid sheltering in an attic where FEMA warns you could get trapped. “Go on the roof only if necessary,” FEMA writes, and “signal for help.”
Do not attempt to walk or swim through floodwaters. Six inches of moving water is enough to knock an adult off their feet. Electrocution is also the second-biggest cause of death during a flood after drowning; never attempt to turn off a circuit breaker box or touch appliances if you are wet or standing in water.
If you come in contact with floodwaters, be sure to wash that area of your body very well when you reach safety.
If at all possible, avoid driving during flash flood conditions. Of course, this isn’t always possible — often people are out when they get caught in a storm. The National Weather Service reports that nearly half of flash-flood fatalities are vehicle-related and the “majority” of victims are male.
First and foremost, never, ever drive through floodwaters or around a roadblock or barrier. “Turn around, don’t drown” is a well-worn NWS slogan for a reason. Just 6 inches of flowing water can move a car and just 12 inches can carry it away — it doesn’t matter how good of a driver you are.
Additionally, even if the water looks shallow, it might not be. “Do not attempt to cross a flooded road even if the car in front of you made it through,” meteorologist Bonnie Schneider writes in her book Extreme Weather.
If your car stalls in water, first responders want you to remember “seatbelt, windows, out.” Do not waste valuable time trying to call 911 and wait for rescue. Unbuckle immediately so you are free to move. Then roll down the windows so that if the car’s electrical system shorts out, you still have a means of escape. (As a backup, buy a “Lifehammer” to punch your way through the window and out of your car. If you do not have a Lifehammer or something similar, the pointy metal ends of a headrest can work in a pinch, The New York Times reports.)
At this point, there is “no right answer,” Joseph Bushra, the medical director with Narberth Ambulance, told WHYY. You need to assess the situation. If it is safe to exit your car and escape to higher ground, do so, but plan your path before getting out of the car and remember, just 6 inches of water can knock an adult over.
If it is not safe to try to make it to higher ground, then you need to get on top of your car. Turn on your hazard lights to make the car visible to first responders. Evacuate children first, starting with the oldest child, and tell them to hang onto whatever they can, The New York Times advises. Once you have evacuated and are on top of your car, then call 911.
It’s not called a “worst-case scenario” for nothing. So what do you do if you end up in the water during a flash flood?
Your number one priority should be to try to get out of the water as quickly as you can. Climb a tree, a building, a car or truck, or head toward any available higher ground.
If you are forced to swim, move perpendicular to the current. Keep in mind this is a last possible resort: “People need to realize that most people who lose their footing in a flash flood don’t get out,” Julie Munger, the founder of Sierra Rescue International, told The New York Times.
If swimming to safety isn’t possible, the Riverside County Fire Department recommends orienting your body so you’re on your back, with your feet down-current, so you can use them to move debris out of the way. “Most victims in swift water die when they get pinned against obstacles, or get trapped in submerged debris and vegetation,” the department writes. Get out of the water or on top of something as quickly as possible — and hold on tight.
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Current conditions: The remnants of Tropical Storm Chantal will bring heavy rain and potential flash floods to the Carolinas, southeastern Virginia, and southern Delaware through Monday night • Two people are dead and 300 injured after Typhoon Danas hit Taiwan • Life-threatening rainfall is expected to last through Monday in Central Texas.
Jim Vondruska/Getty Images
The flash floods in Central Texas are expected to become one of the deadliest such events in the past 100 years, with authorities updating the death toll to 82 people on Sunday night. Another 41 people are still missing after the storms, which began Thursday night and raised the Guadalupe River some 26 feet in less than an hour, providing little chance for holiday weekend campers and RVers to escape.
Although it’s far too soon to definitively attribute the disaster to climate change, a warmer atmosphere is capable of holding more moisture and producing heavy bursts of life-threatening rainfall. Disasters like the one in Texas are one of the “hardest things to predict that’s becoming worse faster than almost anything else in a warming climate, and it’s at a moment where we’re defunding the ability of meteorologists and emergency managers to coordinate,” Daniel Swain of the University of California Agriculture and Natural Resources told the Los Angeles Times. Meteorologists who spoke to Wired argued that the National Weather Service “accurately predicted the risk of flooding in Texas and could not have foreseen the extreme severity of the storm” ahead of the event, while The New York Times noted that staffing shortages at the agency following President Trump’s layoffs potentially resulted in “the loss of experienced people who would typically have helped communicate with local authorities in the hours after flash flood warnings were issued overnight.”
President Trump announced this weekend that his administration plans to send up to 15 letters on Monday to important trade partners detailing their tariff rates. Though Trump didn’t specify which countries would receive such letters or what the rates could be, he said the tariffs would go into effect on August 1 — an extension from the administration’s 90-day pause through July 9 — and range “from maybe 60% or 70% tariffs to 10% and 20% tariffs.” Treasury Secretary Scott Bessent added on CNN on Sunday that the administration would subsequently send an additional round of letters to 100 less significant trade partners, warning them that “if you don’t move things along” with trade negotiations, “then on August 1, you will boomerang back to your April 2 tariff level.” Trump’s proposed tariffs have already rattled industries as diverse as steel and aluminum, oil, plastics, agriculture, and bicycles, as we’ve covered extensively here at Heatmap. Trump’s weekend announcement also sent jitters through global markets on Monday morning.
President Trump’s gutting of the Inflation Reduction Act with the signing of the budget reconciliation bill last week will add an extra 7 billion tons of emissions to the atmosphere by 2030, a new analysis by Climate Brief has found. The rollback on renewable energy credits and policy means that “U.S. emissions are now set to drop to just 3% below current levels by 2030 — effectively flatlining — rather than falling 40% as required to hit the now-defunct [Paris Agreement] target,” Carbon Brief notes. As a result, the U.S. will be about 2 billion tons short of its emissions goal by 2030, adding an emissions equivalent of “roughly the annual output of Indonesia, the world’s sixth-largest emitter.”
To reach its conclusions, Carbon Brief utilized modeling by Princeton University’s REPEAT Project, which examined how the current obstacles facing U.S. wind and solar energy will impact U.S. emissions targets, as well as the likely slowdown in electric vehicle sales and energy efficiency upgrades due to the removal of subsidies. “Under this new set of U.S. policies, emissions are only expected to be 20% lower than 2005 levels by 2030,” Carbon Brief writes.
Engineering giant SKF announced late last week that it had set a new world record for tidal turbine reliability, with its systems in northern Scotland having operated continuously for over six years at 1.5 megawatts “without the need for unplanned or disruptive maintenance.” The news represents a significant milestone for the technology since “harsh conditions, high maintenance, and technical challenges” have traditionally made tidal systems difficult to implement in the real world, Interesting Engineering notes. The pilot program, MayGen, is operated by SAE Renewables and aims, as its next step, to begin deploying 3-megawatt powertrains for 30 turbines across Scotland, France, and Japan starting next year.
Satellites monitoring the Southern Ocean have detected for the first time a collapse and reversal of a major current in the Atlantic Meridional Overturning Circulation. “This is an unprecedented observation and a potential game-changer,” said physicist Marilena Oltmanns, the lead author of a paper on the finding, adding that the changes could “alter the Southern Ocean’s capacity to sequester heat and carbon.”
A breakthrough in satellite ocean observation technology enabled scientists to recognize that, since 2016, the Southern Ocean has become saltier, even as Antarctic sea ice has melted at a rate comparable to the loss of Greenland’s ice. The two factors have altered the Southern Ocean’s properties like “we’ve never seen before,” Antonio Turiel, a co-author of the study, explained. “While the world is debating the potential collapse of the AMOC in the North Atlantic, we’re seeing that the Southern Ocean is drastically changing, as sea ice coverage declines and the upper ocean is becoming saltier,” he went on. “This could have unprecedented global climate impacts.” Read more about the oceanic feedback loop and its potential global consequences at Science Daily, here.
The French public research university Sciences Po will open the Paris Climate School in September 2026, making it the first school in Europe to offer a “degree in humanities and social sciences dedicated to ecological transition.” The first cohort will comprise 100 master’s students in an English-language program. “Faced with the ecological emergency, it is essential to train a new generation of leaders who can think and act differently,” said Laurence Tubiana, the dean of the Paris Climate School.
A fifth of U.S. counties now restrict renewables development, according to exclusive data gathered by Heatmap Pro.
A solar farm 40 minutes south of Columbus, Ohio.
A grid-scale battery near the coast of Nassau County, Long Island.
A sprawling wind farm — capable of generating enough electricity to power 100,000 homes — at the northern edge of Nebraska.
These projects — and hundreds of others — will never get built in the United States. They were blocked and ultimately killed by a regulatory sea-change that has reshaped how local governments consider and approve energy projects. One by one, counties and municipalities across the country are passing laws that heavily curtail the construction of new renewable power plants.
These laws are slowing the energy transition and raising costs for utility ratepayers. And the problem is getting worse.
The development of new wind and solar power plants is now heavily restricted or outright banned in about one in five counties across the country, according to a new and extensive survey of public records and local ordinances conducted by Heatmap News.
“That’s a lot,” Nicholas Bagley, a professor at the University of Michigan Law School, told us. Bagley said the “rash of new land use restrictions” owes partly to the increasing politicization of renewable energy.
Across the country, separate rules restrict renewables construction in 605 counties. In some cases, the rules greatly constrain where renewables can be built, such as by requiring that wind turbines must be placed miles from homes, or that solar farms may not take up more than 1% of a county’s agricultural land. In hundreds of other cases, the rules simply forbid new wind or solar construction at all.
Even in the liberal Northeast, where climate concern is high and municipalities broadly control the land use process, the number of restrictions is rising. At least 59 townships and municipalities have curtailed or outright banned new wind and solar farms across the Northeast, according to Heatmap’s survey.
Even though America has built new wind and solar projects for decades, the number of counties restricting renewable development has nearly doubled since 2022.
When the various state, county, and municipality-level ordinances are combined, roughly 17% of the total land mass of the continental United States has been marked as off limits to renewables construction.
These figures have not been previously reported. Over the past 12 months, our energy intelligence platform Heatmap Pro has conducted what it believes to be the most comprehensive survey of county and municipality-level renewables restrictions in the United States. In part, that research included surveys of existing databases of local news and county laws, including those prepared by the Sabin Center for Climate Change Law at Columbia University.
But our research team has also called thousands of counties, many of whose laws were not in existing public databases, and we have updated our data in real time as counties passed ordinances and opposed projects progress (or not) through the zoning process. This data is normally available to companies and individuals who subscribe to Heatmap Pro. In this story, we are making a high-level summary of this data available to the public for the first time.
Restrictions have proliferated in all regions of the country.
Forty counties in Virginia alone now have an anti-renewable law on the books, effectively halting solar development in large portions of the state, even as the region experiences blistering electricity load growth.
These anti-solar laws have even begun to slow down energy development across the sunny Southwest. Counties in Nevada and Arizona have rejected new solar development in the same parts of the state that have already seen a high number of solar projects, our data show. Since President Trump took office in January, the effect of these local rules have become more acute — while solar developers could previously avoid the rules by proposing projects on federal land, a permitting slowdown at the Bureau of Land Management is now styming solar projects of all types in the region, as our colleague Jael Holzman has reported.
In the Northeast and on the West Coast, where Democrats control most state governments, towns and counties are still successfully fighting and cancelling dozens of new energy projects. Battery electricity storage systems, or BESS projects, now draw particular ire. The high-profile case of the battery fire in Moss Landing, California, in January has led to a surge of local opposition to BESS projects, our data shows. So far in 2025, residents have cited the Moss Landing case when fighting at least six different BESS projects nationwide.
That’s what happened with Jupiter Power, the battery project proposed in Nassau County, Long Island. The 275-megawatt project was first proposed in 2022 for the Town of Oyster Bay, New York. It would have replaced a petroleum terminal and improved the resilience of the local power grid.
But opposed residents began attending public meetings to agitate about perceived fire and environmental risks, and in spring 2024 successfully lobbied the town to pass a six-month moratorium on battery storage systems. The developer of the battery storage system, Jupiter Power, announced it would withdraw after the town passed two consecutive extensions to the moratorium and residents continued agitating for tighter restrictions.
That pattern — a town passes a temporary moratorium that it repeatedly extends — is how many projects now die in the United States.
The Nebraska wind project, North Fork Wind, was effectively shuttered when Knox County passed a permanent wind-energy ban. And the solar project south of Columbus, Ohio? It died when the Ohio Power Siting Board ruled that “that any benefits to the local community are outweighed by public opposition” to the project, which would have generated 70 megawatts, enough to power about 9,000 homes.
The developers of both of these projects are now waging lengthy and expensive legal appeals to save them; neither has won yet. Even in cases where the developer ultimately prevails against a local law, opposition can waste years and raise the final cost of a project by millions of dollars.
Our Heatmap Pro platform models opposition history alongside demographic, employment, voting, and exclusive polling data to quantify the risk a project will face in every county in the country, allowing developers to avoid places where they are likely to be unsuccessful and strategize for those where they have a chance.
Access to the full project- and county-level data and associated risk assessments is available via Heatmap Pro.
And more on the week’s biggest conflicts around renewable energy projects.
1. Jackson County, Kansas – A judge has rejected a Hail Mary lawsuit to kill a single solar farm over it benefiting from the Inflation Reduction Act, siding with arguments from a somewhat unexpected source — the Trump administration’s Justice Department — which argued that projects qualifying for tax credits do not require federal environmental reviews.
2. Portage County, Wisconsin – The largest solar project in the Badger State is now one step closer to construction after settling with environmentalists concerned about impacts to the Greater Prairie Chicken, an imperiled bird species beloved in wildlife conservation circles.
3. Imperial County, California – The board of directors for the agriculture-saturated Imperial Irrigation District in southern California has approved a resolution opposing solar projects on farmland.
4. New England – Offshore wind opponents are starting to win big in state negotiations with developers, as officials once committed to the energy sources delay final decisions on maintaining contracts.
5. Barren County, Kentucky – Remember the National Park fighting the solar farm? We may see a resolution to that conflict later this month.
6. Washington County, Arkansas – It seems that RES’ efforts to build a wind farm here are leading the county to face calls for a blanket moratorium.
7. Westchester County, New York – Yet another resort town in New York may be saying “no” to battery storage over fire risks.