Current conditions: Wildfires are raging on the Greek island of Chios • Forecasters are monitoring a low-pressure system in the Atlantic that could become a tropical storm sometime today • Residents in eastern North Dakota are cleaning up after tornadoes ripped through the area over the weekend, killing at least three people.
THE TOP FIVE
1. Intense U.S. heat wave could break numerous records
A dangerous heat wave moves from the Midwest toward the East Coast this week, and is expected to challenge long-standing heat records. In many places, temperatures could hit 100 degrees Fahrenheit and feel even warmer when humidity is factored in. “High overnight temperatures will create a lack of overnight cooling, significantly increasing the danger,” according to the National Weather Service. Extreme heat warnings and advisories are in effect from Maine through the Carolinas, across the Ohio Valley and down into southern states like Mississippi and Louisiana. “It’s basically everywhere east of the Rockies,” National Weather Service meteorologist Mark Gehring told The Associated Press. “That is unusual, to have this massive area of high dew points and heat.”
AccuWeather
Regional grid operator PJM Interconnection, which covers 13 states, issued an energy emergency alert for today. The alert urges power transmission and generation owners to delay any planned maintenance so that no grid sources are out of commission as temperatures soar. A heat wave of this nature is rare this early in the summer. The last time temperatures hit 100 degrees in June in New York City, for example, was in 1995, according to AccuWeather. Heat waves are becoming more frequent and more intense as the climate warms. Here’s a look at how these events have changed over the past 60 years or so:
EPA
2. Oil prices jump on Iran’s threat to close Strait of Hormuz
Oil markets are jittery this morning after Iran’s parliament endorsed a measure to block the Strait of Hormuz in response to U.S. strikes on Iranian nuclear facilities. About 20% of the world’s oil and liquified natural gas shipments travel through the shipping route, and as The Wall Street Journalexplains, the supplies “dictate prices paid by U.S. drivers and air travelers.” Oil prices rose to five-month highs this morning on the news. Tehran has long threatened to close the strait, but such a move is seen as unlikely because it would disrupt Iran’s own energy exports, which are its “sole global energy revenue stream,” one analyst told the Journal.
3. Senate parliamentarian rejects some megabill climate provisions
A handful of climate-related provisions in the GOP’s reconciliation bill are in limbo after the Senate parliamentarian advised that the policies violated the “Byrd Rule,” i.e. were deemed extraneous to budgetary matters, and thus were subject to a 60-vote threshold instead of the simple majority allowed for reconciliation. The provisions include:
- A Republican push to quickly roll back the Environmenral Protection Agency’s limits on tailpipe emissions
- The GOP effort at permitting reform, which essentially allowed project developers to prevent environmental reviews from being subject to litigation if they paid an upfront fee (for more on this one, here’s a take from Heatmap’s Matthew Zeitlin)
- A proposal to repeal statutory authorizations for Inflation Reduction Act programs
- A mandated sale of all electric vehicles and charging infrastructure owned by the United States Postal Service
The Senate Finance Committee is set to meet with the parliamentarian today.
4. SCOTUS opens door for fuel producers to challenge California’s emissions waiver
In case you missed it: The Supreme Court on Friday gave the green light for fuel producers to challenge a Clean Air Act waiver issued by the EPA that lets California set tougher vehicle emissions standards than those at the federal level. A lower court rejected the lawsuit from Diamond Alternative Energy and other challengers last year, but as Justice Brett Kavanaugh wrote for the majority, California’s ambitious Zero-Emission Vehicle Program is hurting fuel producers, so they have standing to sue. The vote was 7 to 2, with Justices Sonia Sotomayor and Ketanji Brown Jackson dissenting.
As Heatmap’s Katie Brigham has explained, if the EPA waiver is eliminated, Tesla could take a big financial hit. That’s because the zero-emissions vehicle program lets automakers earn credits based on the number and type of ZEVs they produce, and since Tesla is a pure-play EV company, it has always generated more credits than it needs. “The sale of all regulatory credits combined earned the company a total of $595 million in the first quarter [of 2025] on a net income of just $409 million,” Brigham reported. “That is, they represented its entire margin of profitability. On the whole, credits represented 38% of Tesla’s net income last year.”
5. Tesla rolls out Robotaxi service in Austin
Tesla launched its Robotaxi service in Austin, Texas, over the weekend. A small number of rides were doled out to hand-picked influencers and retail investors, and a Tesla employee sat in the front passenger seat of each autonomous Model Y to monitor safety. The rollout was “uncharacteristically low-key,” Bloombergreported, but CEO Elon Musk said the company is being “super paranoid about safety.” San Francisco, Los Angeles, and San Antonio are rumored to be the next cities slated for Robotaxi service. “Tesla is still behind Waymo, by several years,” wrote Jameson Dow at Electrek. “But Waymo has also not been scaling particularly quickly, and certainly both are slower than a lot of techno-optimists would have liked. So we’ll have to see which tortoise wins this race.” The stakes are pretty high: Investment management firm ARK Invest projected that Robotaxis could bring in $951 billion for Tesla by 2029 and make up 90% of the company’s earnings.
THE KICKER
A new report from energy think tank Ember concludes that in the world’s sunniest cities, it’s now possible (and economically viable) to get at least 90% of the way to constant solar electricity output for every hour of the day, 365 days a year.
AccuWeather
