Weather Story

Hot and Humid Today

Dangerous Late Season Heat Wave This Week

[Sunday, Sept. 13, 2026] Very warm conditions with small rain chances in parts of southeast Missouri and north of Interstate 64 are forecast today. High temperatures will reach the lower to middle 90s with peak heat index values around 100 degrees. If you have outdoor plans, prepare for impacts from the heat by staying hydrated, wearing cool, loose-fitting clothing and, taking frequent breaks in the shade or in an air-conditioned location.

[Sunday, Sept. 13, 2026] A dangerous late season heat wave is expected Tuesday through Thursday. High temperatures will reach the middle to upper 90s, with daily peak heat index values of 103 to 108 degrees. Elevated heat may linger through Friday and into the start of next weekend. If you have outdoor activities planned during this time, consider preparing alternate arrangements and heat mitigation plans.