Much of the Pittsburgh region will be under a heat advisory Thursday, according to the National Weather Service in Moon.
The heat index is expected to reach 103 degrees as the advisory will be in effect from noon to 8 p.m. Heat-related illness, such as heat exhaustion or heat stroke, could occur as a result of hot temperatures and high humidity.
The weather service advises staying cool and drinking plenty of fluids while taking extra precautions during work or time spent outside.
The advisory is in effect for Allegheny, Westmoreland and surrounding counties.
Strong thunderstorms with heavy winds and hail could be possible this afternoon and Friday, according to the weather service.