A Heat Advisory is in effect from 2 to 10 p.m. Thursday for Auglaize, Butler, Darke, Mercer, Miami, Montgomery, Preble, Shelby, Warren and Wayne (Indiana) counties. Heat stroke, heat exhaustion and other heat-related illnesses will be possible, especially if you spend a significant amount of time outdoors or are involved in any strenuous outdoor activity. Reduce outdoor activities, take frequent breaks in shaded or air conditioned environments. Heat stroke is an emergency, call 911.
An Excessive Heat Watch has been issued for all counties in the Miami Valley from noon Friday through 8 p.m. Saturday. Make preparations for dangerous conditions in which heat exhaustion or heat stroke are possible.
Overnight: Partly cloudy, mild and muggy conditions are expected overnight with temperatures falling to a low around 70 degrees, Storm Center 7 Chief Meteorologist McCall Vrydaghs said. Patchy fog will develop by morning, and dense spots are possible.
Thursday: Some early morning fog in spots is likely, then it will become partly sunny and hot. Temperatures climb to a high in the lower 90s. The heat index will rise to around 100 degrees. There is a slight chance of a stray afternoon or early shower or storm, but most will remain dry.