The extreme heat is staying with us thru the upcoming weekend. An Excessive Heat Warning is in effect until 7 pm on Saturday as we are looking at temperatures in the 90s and heat index readings well above 100. For today we do have a chance we could see a shower or thunderstorm with a high of 92 and heat index readings of around 102 this afternoon. Thursday we are looking at a high of 95 and a heat index reading of 107 and highs of 97 and 95 on Friday and Saturday. The National Weather Service in St. Louis says the combination of hot temperatures and high humidity will likely lead to an increased risk of heat-related stress and illness. The very young, the elderly, those without air conditioning, and those participating in strenuous outdoor activities will be the most susceptible. Also, car interiors can reach lethal temperatures in a matter of minutes.