• Mon. Sep 25th, 2023


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It’s Going to Be Dangerously Hot for 100 Million Americans

A wave of heat-related warnings and advisories were in effect Wednesday for nearly a third of the U.S. population, mostly in the Midwest and Southeast, the National Weather Service said, adding that it may take weeks to see relief.

More than 95 million people from Southern California to western Pennsylvania and as far south as Florida were under an excessive heat warning or heat advisory, meteorologists said. Residents should expect to see temperatures rise well into the 90s and 100s, with heat indexes in some locations soaring into the triple digits.

Wednesday’s temperatures will be “well above-normal to record-breaking” from the Upper Midwest to the Southeast, the Weather Service said.

Some of the most extreme heat was expected in central Georgia through the evening. Temperatures were forecast to hover around the 100-degree mark, with heat indexes over 110 degrees for areas east and south of Atlanta.

Steamy conditions were also forecast across portions of southwest Indiana, southeast Missouri, western Kentucky and Southern Illinois, where an excessive heat warning was in place through Thursday evening. Heat indexes over the next two days will top out around 106 and 107 degrees. In southwest Michigan and northwest Ohio, heat indexes were expected to reach 110 degrees.

The soaring temperatures appear to be part of a hot weather pattern settling over the lower 48 states ahead of the official start of summer next week. Over the weekend, a scorching heat wave brought record high temperatures to 16 cities from the Southwest to the Southern Plains, and portions of the Southwest and South Texas saw dangerously high temperatures last week.

In Odessa, Texas, which faced temperatures above 100 degrees this week, about 165,000 residents were without potable water Tuesday because of a water line break, officials said. A boil water notice was issued and was expected to remain in effect until water pressure is restored and water is deemed safe to consume. In the interim, the Texas Division of Emergency Management was distributing bottled water.

Heat waves are becoming more frequent, hotter and longer lasting than in previous decades, scientists say. While tying a single one to climate change requires scientific analysis, the federal National Climate Assessment noted in 2018 that the frequency of heat waves had jumped from an average of two per year in the 1960s to six per year by the 2010s. The heat-wave season in the United States has stretched to 45 days longer than it was in the 1960s, according to the report.

This year seems likely to fit the trend. Much of the country will continue to see above-normal temperatures through nearly the end of June, meteorologists said. And a recent climate trend report from the National Oceanic and Atmospheric Administration said above-normal summer temperatures were likely across the contiguous United States through August, except for small areas in the Pacific Northwest and Northern Plains.

Excessive heat has become the norm in places around the world, and researchers have already started examining the ways in which extreme heat affects a range of people in intense environments, from athletes and soldiers to ordinary people. Scientists hope their work will help us better understand how many more people will be afflicted by heat-related ailments, how frequent and severe their suffering will be and how to best protect the most vulnerable populations.