Forget about any worries of tropical weather today. Instead pay attention to the heat: temperatures in Jacksonville could feel as high as 113 degrees.

A heat advisory has been issued for Florida by the National Weather Service on Saturday at 1:11 a.m. valid between noon and 6 p.m."Heat index values up to 110 degrees expected," the NWS said."Hot temperatures and high humidity may cause heat illnesses,

Today, 17 million are under flood alerts across the Gulf Coast and in the Mid-Atlantic, and 19 million are under heat alerts across the Mid-Atlantic, southern Florida and Mississippi Valley.

UPDATE: A heat advisory has also been issued for Miami-Dade and Broward counties for Friday. - While Hurricane Idalia pummeled parts of the Gulf Coast, South Florida felt a breeze here and there.

Miami expects scattered showers and thunderstorms with brief dry periods and high temperatures nearing 90 degrees.

South Florida is shutting down the rain and turning up the thermostat. Sunny and hot conditions are expected on Friday with highs in the low-90s and feels-like numbers at 105 degrees and above. In response to this, a heat advisory has been issued for South Florida from 11 a.m. until 6 p.m., the National Weather Service said.