Record-breaking heat spread to the eastern United States from the Midwest on Wednesday, placing tens of millions of people under heat warnings expected to last through the July 4 holiday weekend, when Americans will celebrate the nation's 250th anniversary. The extreme heat was forecast to push real-feel temperatures to between 100 and 115 degrees Fahrenheit (37.8 to 46.1 degrees Celsius) across much of the region, elevating the risk of heat-related illness for vulnerable populations and threatening to overwhelm power grids already strained by rising consumption from data centers and electric vehicles.
Impact on Daily Life
In Hill City, Kansas, a small high plains town 270 miles east of Denver, mail carrier Sabrina Hooper, 34, was struggling with the temperatures just one week after starting her job. "It's completely debilitating," Hooper said of the heat's effect on her work, which involves walking up to 10 miles each day to deliver parcels. She finds some relief from lawn sprinklers: "It's so nice. You can take your hat off, get it wet, slap it back on your head." Hill City was the nation's hottest spot for five consecutive days in 2012, when another record-breaking heatwave pushed the town's heat index to 108 degrees. The heat index measures how it feels when humidity is factored into the air temperature.
Dana Robles, who lives in Brownsville, Texas, near the Gulf Coast at the US-Mexico border, worried on Wednesday about the mounting costs of cooling her home as the heat index rose to 108 degrees. During peak temperatures, her family's monthly power bill can exceed $300, nearly one-third of what they pay for rent. Robles also fears blackouts due to the overtaxed power grid. "I'm scared the electricity is going to go off all day and our food is going to get spoiled," she said.
Preparations and Challenges
In Chicago, high-school science teacher Michelle Klein, 57, began preparing for the heat over the weekend. She filled her car with gas, did her weekly grocery shopping early, stocked the refrigerator with extra cold drinks, and gave her plants a deep soak. "The basil was being a diva and needed another drink of water this morning," Klein said on Tuesday evening after going on her usual evening walk despite the 103-degree heat index. In the city's suburbs, property investor Amy Kaspar, 50, received an urgent call on Monday night from a tenant whose air conditioner was only blowing warm air. Kaspar discovered the appliance was working fine but could not keep up with cooling the unit given the intense heat and humidity. "Combined with the wind, it feels like standing behind the exhaust of a bus right now in Chicago," Kaspar said.
Cooling Centers and Community Response
Chicago's Office of Emergency Management and Communications urged residents on Wednesday to periodically check in with relatives, neighbors, seniors, and other vulnerable populations. If contact cannot be made, the office said Chicagoans can request a well-being check from the city by calling 311. The scorching US temperatures mirrored those in western Europe, which recently experienced its own record-breaking heatwave, an event scientists said would have been "virtually impossible" without human-caused climate change. Scientists have confirmed through years of studies that greenhouse gas emissions are making heatwaves around the world both more likely and intense.
The extreme heat began creeping into New York City on Wednesday morning, prompting the city to open hundreds of cooling centers and deploy more than a dozen "cool vans" equipped with water, electrolytes, sunscreen, and meals for New Yorkers in need of relief, Mayor Zohran Mamdani said at a press conference. Air conditioning was on full blast at a senior center in Harlem on Wednesday, where a sign in 13 languages advertised the space as a "cooling centre" for the public. The senior center's director, Richard Allman, said it would remain open beyond its usual hours over the July 4 weekend. "We try to make this a comfortable place for people on an extra-hot day," he said.
Energy Conservation Measures
Ahead of the heatwave, city leaders asked operators of signs in Times Square to reduce the brightness of their billboards to lower energy consumption and requested that businesses set thermostats no lower than 78 degrees. The city's energy provider, Con Edison, urged customers to limit energy use from 2pm to 10pm. The city has also extended public pool hours, opened additional cooling centers in libraries and municipal buildings, and expanded street outreach efforts.
