Extreme heat hit Chautauqua County on Wednesday, with temperatures hitting the low 90s and many looking to cool down.

With the addition of humidity, a heat advisory was issued on the second official day of summer from the National Weather Service for Chautauqua and Erie counties.

“Heat index values in the upper 90s are expected inland from the Lake Erie shoreline,” the National Weather Service said in its alert. “Hot temperatures and high humidity may cause heat illnesses to occur. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. “

Temperatures were expected to be in the 70s today and Friday, following potential rain or storms, with more thunderstorms expected to roll in on the weekend that will lead to a cool Monday and Tuesday.