NWS severe weather warnings have already been issued across Wisconsin this morning. Heavy rain is forecast for southwestern Pennsylvania, where up to five inches could fall before the day ends.
Thunderstorms are also possible in the southwestern states.
Dangerous heat conditions will continue today throughout the Midwest and the Upper Plains and will extend into the Gulf States. Overnight, local officials report wind damage, mainly in the form of downed trees and power lines, occurred in Pennsylvania, Ohio, Michigan and Virginia. Flooding and minor storm damage was also reported in California and Arizona.