National Weather Service United States Department of Commerce

Dangerously hot and humid conditions will continue today across central and east-central MO as well as southwest IL. Peak heat index values will be around 100-103 deg F today. Remember to drink plenty of water, spend time in air-conditioned places, take frequent breaks if you're working outside, and check on friends and neighbors.
A few strong to severe thunderstorms are possible today across northeast MO and west central IL. The strongest storms could produce large hail, damaging wind gusts, and locally heavy rainfall.