Ahead of Monday's hot weather, some schools are taking precautions by announcing they may have half days.
The Chicago area continues to deal with a heat wave Sunday, with Cook County remaining under an Excessive Heat Warning.
Following a warm Father's Day with temps in the 80s and upper 90s, temperatures for Monday are expected to rise into the upper 90s.
The Kansas City metro area is in for a sweltering weekend with temperatures and heat indexes pushing toward 100 degrees.
The National Weather Service in Saint Louis has issued a heat advisory from Friday at 12pm to Sunday at 8pm.More news: Trump slams Federal Bureau of Investigation agents who wanted to 'stop' his presidency
Thankfully, the heat is short-lived and we return to highs into the low 80s the rest of the week.
Saturday morning rain and storms clear out fast, opening the door for the heat and humidity to build.
TONIGHT: Clouds will slowly clear out of Mid-Missouri into the night, with a mild and humid evening expected. There is a chance for some afternoon showers and thunderstorms. This also means humidity will be very high throughout the day as well even if you don't get under one of these showers.
Temperatures will stay mild through the night with a steady wind out of the south gusting up to 25 miles per hour at times.
Monday will be sunny and hot with a high of 94 and a heat index of 103. Make sure to use caution if you plan on being outside and stay hydrated by drinking plenty of water.