Heat indices will generally top out somewhere from 100 to 105 from the Southern Plains, Midwest and Great Lakes on July 24 and the Northeast and Mid-Atlantic by July 25, Mullinax said.

An extreme heat warning was issued by the National Weather Service in Jacksonville at 12:22 a.m. on Monday, July 28. Forecasters warned temperatures could hit 95 to 103 degrees today, with a heat ...

During a heat warning, the NWS also recommends avoiding outdoor activities during the heat of the day and drinking plenty of water while taking frequent breaks in the shade or indoors.

This is the lowest level heat alert, it’s issued when dangerous heat is happening, but the heat is not quite to the level of an excessive heat warning. Heat alert thresholds do vary a bit from place ...

If there’s a heat alert in effect—whether it’s an advisory or a warning—it’s time to slow down, stay cool, and check in on others, especially kids, seniors, and pets.

The last heat alert is a heat advisory. This is the lowest level heat alert, it’s issued when dangerous heat is happening, but the heat is not quite to the level of an excessive heat warning.

A heat advisory means the temperature will be at least 100°F, or the heat index will be at least 75°F. An excessive heat watch means the temperature will be at least 110°F and not fall below 75°F for ...