The National Weather Service (NWS) issued an excessive heat warning for Callaway County that will last for most of the week.
The heat warning went into effect at 3:07 a.m. on Monday morning. It will remain in effect until 10 p.m. on Thursday, the NWS advisory states.
The advisory is for "dangerously hot conditions with heat index values up to 117."
All of Missouri is under an excessive heat advisory. Arkansas, Illinois, Iowa, Kansas, Louisiana, Nebraska and Parts of Texas are also under the advisory.
The local NWS forecast office is located in Saint Louis.
According to the NWS forecast, the high on Monday was 95 degrees. Heat index values were as high as 115.
Tuesday is expected to have a high of 97 degrees, with heat index values as high as 116.
Wednesday's high is expected to be 99 degrees. Thursday -- the final day of the heat advisory -- is expected to also be 99 degrees. No estimated heat index values were available for these days.
The weekend is expected to be cooler, with a high of 83 on Saturday and a high of 78 on Sunday.
The NWS heat advisory warns that heat related illnesses increase "significantly" during periods of extreme heat and high humidity.
During this period of high heat, the NWS advises people to drink plenty of fluids, stay indoors and out of the sun, and to check on relatives and neighbors. Children and pets should not be left unattended in vehicles. If possible, NWS encourages "strenuous activities" to be rescheduled to early morning or evening.
If anyone is overcome by heat, they should immediately move to a cool and shaded location. In the event of heat stroke, call 911.
According to an online map from the Missouri Department of Health and Senior Services, Callaway County has two cooling stations where people can beat the heat indoors.
The cooling stations are:
Holts Summit Public Library, 188 West Simon Boulevard. Hours of 3-6 p.m. Monday, Tuesday and Thursday, 10 a.m.-6 p.m. on Wednesday and 10 a.m.-1 p.m. on Saturday.
Callaway County Public Library, 710 Court Street. Hours of 3-6 p.m. Monday, Tuesday and Thursday, 10 a.m.-6 p.m. on Wednesday and 10 a.m.-1 p.m. on Saturday.
National Weather Service, St. Louis at https://www.weather.gov/lsx/