Summer has been brutally hot in the Southwest, toppling records set just last year, and the heat isn’t over yet
For the past 100 days in Phoenix, Ariz., the temperature has risen to—and often well above—100 degrees Fahrenheit . In this city and much of the heat-weary Southwest, that streak will last at least a few more days as yet anotherThe heat wave punctuates what has been a record-hot summer for parts of the Southwest, including the major cities of Phoenix and Las Vegas–one that has toppled the previous records for the hottestset in those cities just last year.
The record-breaking heat of both summers has come from a series of heat waves where masses of hot air that park over an area for days. “We’ve basically had that for the overwhelming majority of the summer,” Woods says. The clear skies that accompany these features mean “land surfaces heat up day after day,” which in turn heats up the air just above the surface, Salerno says.
“Essentially all heat-related deaths are preventable,” says Kristie Ebi, an epidemiologist who specializes in heat-related health risks. Many cities, including Phoenix, are looking for ways to better warn residents and to reduce deaths and hospitalizations from heat-related illness. The NWS has also been working on better warning practices, including a new experimental tool calledbecause they don’t allow the body time to sufficiently cool down.
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