What is the forecast for the week ahead?

A second Santa Ana wind event is due to set in Monday afternoon. “We’re expecting moderate Santa Ana winds over the next few days, generally in the 20 to 30 [mile per hour] range, gusting to 50, across the mountains and through the canyons,” Eric Drewitz, a meteorologist with the Forest Service, told me on Sunday. Drewitz noted that the winds will be less severe than last week’s, when the fires flared up, but he also anticipates they’ll be “more easterly,” which could blow the fires into new areas. A new red flag warning has been issued through Wednesday, signaling increased fire potential due to low humidity and high winds for several days yet.

If firefighters can prevent new flare-ups and hold back the fires through that wind event, they might be in good shape. By Friday of this week, “it looks like we could have some moderate onshore flow,” Drewitz said, when wet ocean air blows inland, which would help “build back the marine layer” and increase the relative humidity in the region, decreasing the chances of more fires. Information about the Santa Anas at that time is still uncertain — the models have been changing, and the wind is tricky to predict the strength of so far out — but an increase in humidity will at least offer some relief for the battered Ventura and Orange Counties.

What areas have been affected so far?

The Palisades Fire, the biggest in L.A., ripped through the hilly and affluent area between Santa Monica and Malibu, including the Pacific Palisades neighborhood, the second-most expensive zip code in Los Angeles and home to many celebrities. Structures in Big Rock, a neighborhood in Malibu, have also burned. The fire has also encroached on the I-405 and the Getty Villa, and destroyed at least two homes in Mandeville Canyon, a neighborhood of multimillion-dollar homes. Students at nearby University of California, Los Angeles, were told on Friday to prepare for a possible evacuation.

The Eaton Fire, the second biggest blaze in the area, has killed 16 people in Altadena, a neighborhood near Pasadena, according to the Los Angeles Times, making it one of the deadliest fires in the modern history of California.

The 1,000-acre Kenneth fire is 100% contained but still burning near Calabasas and the gated community of Hidden Hills. The Hurst Fire has burned nearly 800 acres and is 89% contained and is still burning near Sylmar, the northernmost neighborhood in L.A. Though there are no evacuation notices for either the Kenneth or the Hurst fires, residents in the L.A. area should monitor the current conditions as the situation continues to be fluid and develop.

The 43-acre Sunset Fire, which triggered evacuations last week in Hollywood and Hollywood Hills, burned no homes and is 100% contained.

The Lidia Fire, which ignited in a remote area south of Acton, California, on Wednesday afternoon, burned 350 acres of brush and is 100% contained.

How did the fires start?

It can take years to determine the cause of a fire, and investigations typically don’t begin until after the fire is under control and the area is safe to reenter, Edward Nordskog, a retired fire investigator from the Los Angeles Sheriff’s Department, told Heatmap’s Emily Pontecorvo. He also noted, however, that urban fires are typically easier to pinpoint the cause of than wildland fires due to the availability of witnesses and surveillance footage.

The vast majority of wildfires, 85%, are caused by humans.So far, investigators have ruled out lightning — another common fire-starter — because there were no electrical storms in the area when the fires started. In the case of the Palisades Fire, there were no power lines in the area of the ignition, though investigators are now looking into an electrical transmission tower in Eaton Canyon as the possible cause of the deadly fire in Altadena. There have been rumors that arsonists started the fires, but investigators say that scenario is also pretty unlikely due to the spread of the fires and how remote the ignition areas are.

How many people have died?

Officially, 24 people have died, but that tally is likely to rise. California Governor Gavin Newsom said Sunday that he expects “a lot more” deaths will be added to the total in the coming days as search efforts continue.

Why has it been so challenging to put out these fires?

Incoming President Donald Trump slammed the response to the L.A. fires in a Truth Social post on Sunday morning: “This is one of the worst catastrophes in the history of our Country,” he wrote. “They just can’t put out the fires. What’s wrong with them?”

Though there is much blame going around — not all of it founded in reality — the challenges facing firefighters are immense. Last week, because of strong Santa Ana winds, fire crews could not drop suppressants like water or chemical retardant on the initial blazes. (In strong winds, water and retardant will blow away before they reach the flames on the ground.)

Fighting a fire in an urban or suburban area is also different from fighting one in a remote, wild area. In a true wildfire, crews don’t use much water; firefighters typically contain the blazes by creating breaks — areas cleared of vegetation that starve a fire of fuel and keep it from spreading. In an urban or suburban event, however, firefighters can’t simply hack through a neighborhood, and typically have to use water to fight structure fires. Their priority also shifts from stopping the fire to evacuating and saving people, which means putting out the fire itself has to wait.

What’s more, the L.A. area faced dangerous fire weather going into last week — with wind gusts up to 100 miles per hour and dry air — and the persistence of the Santa Ana winds during firefighting operations through the weekend made it extremely difficult for emergency managers to gain a foothold.

Is there enough water to fight the fires?

Trump and others have criticized Los Angeles for being unprepared for the fires, given reports that some fire hydrants ran dry or had low pressure during operations in Pacific Palisades. According to the Los Angeles Department of Water and Power, about 20% of hydrants were affected, mostly at higher elevations.

The problem isn’t a lack of preparation, however. It’s that the L.A. wildfires are so large and widespread, the county’s preparations were quickly overwhelmed. “We’re fighting a wildfire with urban water systems, and that is really challenging,” Los Angeles Department of Water and Power CEO Janisse Quiñones said in a news conference last week. When houses burn down, water mains can break open. Civilians also put a strain on the system when they use hoses or sprinkler systems to try to protect their homes.

On Sunday, Judy Chu, the Democratic lawmaker representing Altadena, confirmed that fire officials had told her there was enough water to continue the battle in the days ahead. “I believe that we're in a good place right now,” she told reporters. Newsom, meanwhile, has responded to criticism over the water failure by ordering an investigation into the weak or dry hydrants.

So-called “super soaker” planes have had no problem with water access; they’re scooping directly from the ocean.

Have aerial firefighting operations resumed?

Yes. Although aerial support was grounded in the early stages of the wildfires due to severe Santa Ana winds, flights resumed during lulls in the storms last week.

There is a misconception, though, that water and retardant drops “put out” fires; they don’t. Instead, aerial support suppresses a fire so crews can get in close and use traditional methods, like cutting a fire break or spraying water. “All that up in the air, all that’s doing is allowing the firefighters [on the ground] a chance to get in,” Bobbie Scopa, a veteran firefighter and author of the memoir Both Sides of the Fire Line, told me last week.

With winds expected to pick up early this week, aerial firefighting operations may be grounded again. “If you have erratic, unpredictable winds to where you’ve got a gust spread of like 20 to 30 knots,” i.e. 23 to 35 miles per hour, “that becomes dangerous,” Dan Reese, a veteran firefighter and the founder and president of the International Wildfire Consulting Group, told me on Friday.

Should I be worried about the smoke?

Because of the direction of the Santa Ana winds, wildfire smoke should mostly blow out to sea. But as winds shift, unhealthy air can blow into populated areas, affecting the health of residents.

Wildfire smoke is unhealthy, period, but urban and suburban smoke like that from the L.A. fires can be particularly detrimental. It’s not just trees and brush immolating in an urban fire, it’s also cars, and batteries, and gas tanks, and plastics, and insulation, and other nasty, chemical-filled things catching fire and sending fumes into the air. PM2.5, the inhalable particulates from wildfire smoke, contributes to thousands of excess deaths annually in the U.S.

You can read Heatmap’s guide to staying safe during extreme smoke events here.

When will it rain?

“The bad news is, I’m not seeing any rain chances,” Drewitz, the Forest Service meteorologist, told me on Sunday. Though the marine layer will bring wetter air to the Los Angeles area on Friday, his models showed it’ll be unlikely to form precipitation.

Though some forecasters have signaled potential rain at the end of next week, the general consensus is that the odds for that are low, and that any rain there may be will be too light or short-lived to contribute meaningfully to extinguishing the fires.

What is the relationship between the L.A. fires and climate change?

The chaparral shrublands around Los Angeles are supposed to burn every 30 to 130 years. “There are high concentrations of terpenes — very flammable oils — in that vegetation; it’s made to burn,” Scopa, the veteran firefighter, told me.

What isn’t normal, though, is the amount of rain Los Angeles got ahead of this past spring — 52.46 inches in the preceding two years, the wettest period in the city’s history since the late 1800s — which was followed by a blisteringly hot summer and a delayed start to this year’s rainy season. Since October, parts of Southern California have received just 10% of their normal rainfall

This “weather whiplash” is caused by a warmer atmosphere, which means that plants will grow explosively due to the influx of rain and then dry out when the drought returns, leaving lots of dry fuels ready and waiting for a spark. “This is really, I would argue, a signature of climate change that is going to be experienced almost everywhere people actually live on Earth,” Daniel Swain, a climate scientist at the University of California, Los Angeles, who authored a new study on the pattern, told The Washington Post.

We know less about how climate change may affect the Santa Anas, though experts have some theories.

What does this mean for L.A.’s housing crisis?

At least 12,000 structures have burned so far in the fires, which is already exacerbating the strain on the Los Angeles housing market — one of the country’s tightest even before the fires — as thousands of displaced people look for new places to live. “Dozens and dozens of people are going after the same properties,” one real estate agent told the Los Angeles Times. The city has reminded businesses that price gouging — including raising rental prices more than 10% — during an emergency is against the law.

Los Angeles had a shortage of about 370,000 homes before the fires, and between 2021 and 2023, the county added fewer than 30,000 new units per year. Recovery grants and federal aid can lag, and it often takes more than two years for even the first Housing and Urban Development Disaster Recovery Grants’ expenditures to go out.

My colleague Matthew Zeitlin wrote for Heatmap that the economic impact of the Los Angeles fire is already much higher than that of other fires, such as the 2018 Camp fire, partly because of the value of the Pacific Palisades real estate.

What does this mean for insurance rates in California?

The wildfires may “deal a devastating blow to [California’s] fragile home insurance market,” Heatmap’s Matthew Zeitlin wrote last week. In recent years, home insurers have left California or declined to write new policies, at least partially due to the increased risk of wildfires in the state.

Depending on the extent of the damage from the fires, the coffers of California’s FAIR Plan — which insures homeowners who can’t get insurance otherwise, including many in Pacific Palisades and Altadena — could empty, causing it to seek money from insurers, according to the state’s regulations. As Zeitlin writes, “This would mean that Californians who were able to buy private insurance — because they don’t live in a region of the state that insurers have abandoned — could be on the hook for massive wildfire losses.”

What’s the best way to keep up with evacuation orders?

First and foremost, sign up for all relevant emergency alerts. Make sure to turn on the sound on your phone and keep it near you in case of a change in conditions. Pack a “go bag” with essentials and consider filling your gas tank now so that you can evacuate at a moment’s notice if needed. Read our guide on what to do if you get a pre-evacuation or an evacuation notice ahead of time so that you’re not scrambling for information if you get an alert.

The free Watch Duty app has become a go-to resource for people affected by the fires, including friends and family of Angelenos who may themselves be thousands of miles away. The app provides information on fire perimeters, evacuation notices, and power outages. Its employees pull information directly from emergency responders’ radio broadcasts and sometimes beat official sources to disseminating it. If you need an endorsement: Emergency responders rely on the app, too.

How can I help?

There are many scams in the wake of disasters as crooks look to take advantage of desperate people — and those who want to help them. To play it safe, you can use a hub like the one established by GoFundMe, which is actively vetting campaigns related to the L.A. fires. If you’re looking to volunteer your time, make a donation of clothing or food, or if you’re able to foster animals the fire has displaced, you can use this handy database from the Mutual Aid Network L.A. There are also many national organizations, such as the Red Cross, that you can connect with if you want to help.

The City of Los Angeles and the Los Angeles Fire Department have asked that do-gooders not bring donations directly to fire stations or shelters; such actions can interfere with emergency operations. Their website provides more information about how you can help — productively — on their website.