National Weather Service United States Department of Commerce

Shower and thunderstorm chances will increase mid-week across Northern Ohio and Northwestern Pennsylvania. Some storms may be severe. High temperatures will climb into the mid-90s, with heat indices around 100F.
Temperatures will gradually increase into the mid-90s by the middle of the week, with heat indices around 100F. This will lead to significant heat risk Tuesday through Thursday. Limit your exposure, seek shelter in air conditioned buildings, and drink plenty of water.