Heat wave blankets central and southern United States, affecting millions
Extreme heat warnings cover about 40 million people across the central and southern U.S. as a persistent heat dome drives temperatures above 100°F, with relief expected mid-week.
A sweltering heat dome is keeping temperatures and humidity unusually high across the central and southern United States, leaving roughly 40 million residents under extreme heat warnings for a second consecutive day. The National Weather Service reports heat indexes exceeding 100°F (38°C) from Minnesota to Mississippi, with some Southwest locations forecast to reach 120°F (49°C).
Pete Miller, outreach manager for the homeless services network Threshold CoC, said the conditions are “extraordinarily hot” and that “the humidity is insane,” noting that people are becoming exhausted and at risk of heat-related illness.
Meteorologist Bob Oravec explained that the heat dome is shifting southward and that “if you have a heat dome in one part of the country, you’ll have a different corresponding weather in another part,” adding that severe thunderstorms, flash flooding and hail are possible around the Great Lakes.
Authorities warned that children, older adults and individuals with certain medical conditions face heightened danger of heat stroke or death, urging the public to stay in air-conditioned spaces, stay hydrated and limit outdoor exposure.
The extreme heat follows a year in which the continental United States recorded its second-hottest first half on record, a trend scientists link to climate change driven by fossil-fuel combustion.