▪ The National Weather Service in Miami will issue a heat advisory if the heat index is 105 degrees for at least a couple of hours. Before 2023, the weather service issued a heat advisory when the heat index hit 108 degrees.

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

Extreme heat and humidity are expected to hammer the New York City area to start the week. We could see our second heat wave of the season, with three consecutive days above 90 degrees.CBS News New York's First Alert Weather team has issued a string of First Alert Weather Days due to the threat of intense heat.