An excessive heat warning means that some people can be seriously affected by heat if precautions are not taken. Sure, it's summer, and it's supposed to be hot.

EXCESSIVE HEAT WARNING goes into effect for most of the area today at 11 a.m. until Wednesday at 8 p.m. The highest risk for heat-related illnesses will be Monday and Tuesday.

An excessive heat warning, the highest alert level on a four-tier scale, means everyone needs to take precautions to stay safe in the heat because "you may become seriously ill or even die," the ...

A heat advisory is issued when the heat index values will be greater than 105 degrees for two hours. Excessive heat warnings are issued when heat index values over 110 degrees are expected.

If you need evidence to convince any stubborn family members that, no, they aren’t immune to extreme heat and, yes, we should put the AC in the window, STAT has you covered.

This warning generally is issued when the maximum heat index temperature is expected to be 105 degrees or higher for at least two days and night time air temperatures will not drop below 75 degrees.

Excessive Heat Warning How to prevent heat stroke and spot symptoms as U.S. bakes Excessive heat is the No. 1 cause of weather-related deaths in the U.S.

Heat alert criteria are slightly different in the Miami metro area. In Miami-Dade and Broward counties, the thresholds for heat alerts are a bit lower. A heat advisory is issued when the heat index ...

A Heat Advisory, which Mifflin and Juniata counties will be under until 8 p.m. Wednesday outside of when the Extreme Heat Warning is active, requires heat indices between 100°F and 105°F.

Excessive Heat Warning — Take action! An Excessive Heat Warning is issued within 12 hours of the onset of extremely dangerous heat conditions.

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, which Mifflin and Juniata counties will be under until 8 p.m. Wednesday outside of when the Extreme Heat Warning is active, requires heat indices between 100°F and 105°F.