Weather Alerts Update: Southeast Pa. under an extreme heat warning until Friday night – heat index values up to 107 degrees Updated: Jul. 25, 2025, 12:56 p.m ...

The weather service adds, "Dangerously hot conditions with heat index values up to 110 degrees expected." "Heat related illnesses increase significantly during extreme heat and high humidity ...

On Thursday at 12:36 p.m. an updated extreme heat warning was issued by the National Weather Service valid for Friday between 10 a.m. and 9 p.m. for Bucks County.

Weather Alerts Update: Extreme heat warning for Southeast Pa. for Friday – heat index values up to 108 degrees Updated: Jul. 24, 2025, 2:07 p.m. | Published: Jul ...

The National Weather Service issued an extreme heat warning at 1:47 a.m. on Thursday valid for Friday between 11 a.m. and 8 p.m. for Passaic, Hudson, Bergen, Essex and Union counties.

In southeast Michigan on Thursday, July 24, the heat index values are forecast to range from 99-103 degrees. Here's how to read the heat index. How does the heat index work?

Michigan is heating up this week. Two southwest counties are already under a heat advisory because of dangerous heat index values.

Highs will soar into the low 90s with some spots possibly hitting the mid 90s. Dew point values in the mid 70s will make for a swampy air mass that yields triple digit peak heat indices.

High humidity and heat return mid-week. This combination will send heat index values into the low 100s for a couple days.

Heat index values will reach into the triple digits once again, so make sure to limit your time outdoors as much as you can. Rain chances will be minimal.