First the squalls, then the swelter.

Nearly a million Miami-area residents lacking electricity and air conditioning are bracing for oppressively hot weather on the heels of Hurricane Irma.

Almost three-quarters of Florida Power and Light’s 1.1 million customers in Miami-Dade County have no power, and officials are warning it could be weeks before electricity is restored, according to a Sun-Sentinel report.

And temperatures are set to soar: Sweltering air and humidity are expected to broil Miami with a heat index as high as 108 degrees over the next four days, according to AccuWeather.

Boca Plaza hotel owner John Wagner was opening up his inn to Florida Light and Power workers Monday, hoping that would get the juice flowing faster.

“We put them up when needed,” he told The Post. “Maybe they’ll get power back here sooner.”

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