katero
Jun 30, 2026

Holiday heat wave: As temperature climbs across much of U.S., so does the danger

Around 162 million under heat alerts02:01June 30, 2026, 4:59 PM EDT / Source: The Associated PressBy The Associated Press

DETROIT — Nature’s oven was on high Tuesday for millions of people in the Midwest and Great Lakes states as intense heat and humidity baked the regions with no immediate relief before the misery shifts to the eastern U.S.

The National Weather Service was blunt: Conditions were “dangerous” as the heat index, a combination of air temperature and humidity, exceeded 100 degrees Fahrenheit in some areas. It warned about a risk for heat-related illnesses, especially among people without air conditioning.

Detroit’s air temperature was in the high 90s, the Weather Service said, and could even reach 100 at some point through Thursday. The city said a dozen recreation centers were open, some until 11 p.m., for people to cool off. Big chunks of Michigan, as well as Illinois, Ohio, Indiana, Kentucky and much of Iowa, were under an extreme heat warning.

The Northeast, including New York City and Boston, will next feel major heat through the Fourth of July holiday. Norristown, Pennsylvania, 20 miles from Philadelphia, canceled a Saturday parade because of the weather.

Philadelphia declared a heat emergency, Wednesday through Saturday, and said 50 cooling centers will operate with extended hours. The city said visitors will find misting tents, water refill stations and medical stations at the free World Cup fan festival at East Fairmount Park.

When the heat’s on, people adjust

The Chicago History Museum offered free admission to state residents who wanted a cool space Tuesday. Roads in a few places in Illinois buckled under the heat. When the surface has no room to expand in the heat, it can rise and crack.

00:48

Millions of Americans brace for scorching heatwave

00:0000:00

At 9:15 a.m., window washer Stephen Mason, 72, was wiping mayflies off glass at a Detroit convenience store. He got an early start to avoid the worst conditions of the day, but it was already 85.

Other posts