About 90 Million People Under Heat Alerts as Heat Dome Shifts Into the Northeast and Mid-Atlantic

Heat Warnings Stretch From the Plains to the Atlantic Coast

The heat dome that settled over the central United States in late June kept expanding through July. By the weekend of July 25-26, 2026, the National Weather Service had extreme heat warnings and heat advisories posted across the Northeast and mid-Atlantic^[2][3][6]. Forecasters expected roughly 90 million people to fall into the "major" or "extreme" heat-risk categories by Saturday, July 25^[2][3]. In parts of the mid-Atlantic, the heat index — what the air actually feels like once humidity is factored in — was forecast to reach 105 to 115 degrees^[5].

A heat dome works like a lid. High pressure parks itself in the upper atmosphere and pushes air down. As that air sinks, it compresses, and compression heats it further. The same high pressure also pushes away the clouds and thunderstorms that would normally break up an afternoon. Heat then stacks up day after day instead of draining off.

This was already the second round of it. In late June and early July, temperature records were tied or broken in several U.S. and Canadian cities, including a high of 106 degrees in Atlantic City, New Jersey, on July 4^[1]. The CDC's heat-tracking system reported "extremely high" rates of heat-related emergency room visits in parts of the country during that stretch^[10]. Among the reported deaths was a 68-year-old Pennsylvania man who collapsed while trimming bushes on July 2, in temperatures above 100 degrees^[10].

Death tolls announced while a heat wave is still happening are always provisional. Heat rarely shows up alone on a death certificate — it usually appears as a heart attack or kidney failure in someone who was already sick, and the full count gets revised upward months later through separate mortality analysis^[9][11]. In an average U.S. year, the CDC counts 67,512 heat-related emergency department visits, 9,235 hospitalizations, and 702 deaths^[11]. That baseline is the backdrop against which this summer is being measured, and it means both "the toll is modest so far" and "the toll is likely much higher than reported" can be defended at the same time, right now, by different people looking at the same data.

What the Weather Actually Forced Washington to Do

One fact nobody disputes: the grid strained under this heat, and the federal government intervened directly to hold it together. On June 30, the Department of Energy issued an emergency order covering PJM, the grid operator serving much of the mid-Atlantic, after PJM forecast demand of 166,147 megawatts — above the region's previous all-time record of 165,563 megawatts, set in 2006^[13][14]. Separate emergency orders kept a coal plant in Michigan (J.H. Campbell) running from May 19 through August 16, and a coal unit in Washington state (Centralia Unit 2) running from June 15 through September 12^[13][33].

Those orders rest on a specific legal tool: Section 202(c) of the Federal Power Act, which lets the Energy Secretary order power plants to keep operating during an emergency, even ones scheduled to retire. The administration's argument is that grids have shed too much "dispatchable" generation — plants that can be switched on any time, regardless of wind or sunlight — right as demand keeps climbing. Air conditioning is the single most effective defense against heat death. It only works, though, if the power stays on. From that angle, keeping a coal plant running through a heat wave isn't about energy policy at all — it's about keeping the lights, and the AC, running for as long as the heat lasts.

That argument doesn't require denying that the planet is warming. It just treats warming as a separate problem from this weekend's risk: emissions cuts don't cool anyone down on a Saturday in July, backers of the policy say, but a working grid does. Congress funded NOAA above what the White House had requested in the fiscal 2026 bill signed January 23, 2026, and hiring for weather-forecasting jobs has reopened — both facts the administration points to when it's accused of leaving the country less prepared^[20].

Grid operators and utilities mostly stay out of the politics of it, because their problem is mechanical, not partisan. Heat raises demand from two directions at once: air conditioners run harder, and hot equipment — transformers, power lines — carries less current, so the same wires do less work. Layered on top of that is a newer source of demand that has nothing to do with the weather: AI data centers, which draw power continuously and are being built faster than new generation can be connected to the grid^[18]. What grid operators want from both parties is the same thing — faster permitting for new power plants and clearer rules on who pays to keep backup generation on standby.

That standby capacity isn't free. Utility Dive, an industry trade publication, reported that plants kept online under these emergency orders have produced far less electricity than expected, even as the costs of keeping them ready keep accruing — costs that eventually reach ratepayers' bills^[15][16].

The Case That the Danger Is Compounding, Not Isolated

A different case starts from the same heat and reaches an opposite emphasis: that this summer's danger comes from two sources layered on top of each other, not one. World Weather Attribution, an international group of climate scientists, concluded that burning fossil fuels made the July 2026 U.S. heat both hotter and more likely^[19]. At the same time, critics argue, the federal government has been cutting the programs built to help people survive that heat.

The clearest example is the Low Income Home Energy Assistance Program, known as LIHEAP, which helps low-income households cover their utility bills. The White House's fiscal 2026 budget proposed eliminating it, and the program's federal staff were dismissed on April 1, 2025^[23][24]. There's a wrinkle worth knowing: LIHEAP is legally required to help with winter heating bills, but it is not required at the federal level to cover summer cooling. That means the program was already thinner protection against heat than against cold, even before any cuts^[23]. Reporting in New York found the state's cooling-assistance program reaching a shrinking share of the people who qualify for it, even as heat risk climbed^[25].

The other pillar of this argument is the National Weather Service itself. More than 600 employees left the agency in 2025, and about 40% of forecast offices still carried significant staffing vacancies during the 2026 heat season^[20][21][22]. CNN reported on the administration "trying to put out a fire they started" at the Weather Service, a description that captures the argument's shape: the vacancies are real and documented, even though no specific missed or delayed heat warning has been publicly tied to them^[20][21]. The National Weather Service's own leaders make a related but narrower point — that meteorologists have covered the staffing gaps through overtime and by borrowing staff between offices, and that the agency is actively rehiring^[20][22].

This camp has also taken direct legal aim at the administration's grid strategy. Michigan's attorney general and public-interest groups in Washington state have sued the Department of Energy, arguing that its emergency orders keeping the Campbell and Centralia coal plants running don't meet the legal bar Section 202(c) actually requires: a genuine, imminent emergency, not an ongoing policy preference for coal^[35].

A Grading System Built Around One Idea: Heat Is Local

Underneath both political arguments sits a technical one the National Weather Service has been pushing for years: that a single national temperature threshold is the wrong way to warn people about heat. Instead, the agency uses a tool called HeatRisk, which grades each day from minor to extreme for a specific place, not the country as a whole. The logic is that 95 degrees in Boston is far more dangerous than 95 degrees in Phoenix, because bodies, buildings, and cities adapt to whatever heat is normal where they are^[12].

That's also why overnight temperatures matter as much as the afternoon peak, maybe more. When nighttime lows stay in the high 70s or low 80s, the body never gets the cooling-off window it needs to recover from a hot day. That's often what turns a hot week into a fatal one, rather than the single hottest afternoon^[4].

Outside U.S. politics entirely, Al Jazeera's coverage skipped the partisan blame almost completely and framed the story instead as a wealthy country whose infrastructure was built for a climate that no longer exists — with the AI-driven surge in electricity demand as the strain that exposes it^[17][18]. It's a lens that centers American resource use rather than American politics, and it lands closer to the grid operators' technical framing than to either domestic political camp's.

The rest of U.S. coverage split in a fairly consistent pattern along those same lines. The Associated Press mostly counted the confirmed dead and left causation out of the story altogether^[9]. Fox Weather covered the human toll in detail but kept climate attribution at a distance, at one point exploring whether 2026 would be the hottest year on record through a prediction market's betting odds rather than emissions data^[7][8]. CNN and E&E News tied the heat more directly to fossil fuels and to federal cuts, with E&E's headline — "Deadly heat is coming. But funding to save lives is not." — asserting the causal link in the headline itself, ahead of the specific evidence^[21][23].

Who Actually Can't Get Out of the Heat

For outdoor workers, older residents living alone, and low-income households rationing air conditioning to save money, the argument isn't really about which forecast or which power plant is right. It's about exposure. Roofers and farmworkers can't step inside when the heat index hits 110. Someone on a fixed income who's afraid of the electric bill may leave the AC off on the exact days it matters most.

Advocates for these groups are pushing for narrower, more durable fixes than either side's national argument: enforceable water-rest-shade rules for people working outside, restored bill assistance, and cooling centers that stay open at night and are reachable without a car^[23]. New York City's mayor activated the city's heat emergency plan on June 29, 2026, ahead of the earlier round of the heat wave — an example of the kind of local, on-the-ground response that both federal camps' arguments tend to skip past^[34].

That gap — between the federal argument over power plants and forecasting budgets, and the local, immediate question of who has a cool place to be tonight — is where this story sits unresolved. The grid held through the June 30 emergency order, but it took a direct federal intervention to make sure it did^[13]. The storms that broke the early-July heat pattern caused more than 1.3 million power outages and were linked to four deaths of their own^[1]. Whether this weekend's numbers — for warnings issued, and eventually for lives lost — end up higher or lower than what's being reported now will depend on tallies that, by every side's own account, aren't finished yet^[9][11].