Record temperatures both in Kansas City and St. Louis on Thursday. The National Weather Service reports the high at KCI of 106. In St. Louis, the record for August 21st is now 104. The high wasn’t the only record broken on Thursday in the state’s two largest cities. Utilities on both sides of the state report record useage. AmerenUE says air conditioners working overtime created the highest demand for electricity in the St. Louis area ever.