You can learn about air quality, pollutant levels and the UV index from the Environmental Protection Agency.
The heat index could get to 107 on Wednesday, according to the National Weather Service. Here is a list of places to stay cool if you do not have air conditioning.
In a matter of days, heavy rains have caused flooding and spread debris around Columbia. City crews were out cleaning fallen trees and loose dirt until 10 p.m. Wednesday.
Scattered storms are expected to produce up to 0.5 inches of rainfall, according to the National Weather Service.
The Missouri River was falling Monday from peak levels of last week, but moderate flooding continued in the northwest corner of the state.
A severe thunderstorm watch has been issued for northern Boone County.
Additional flooding in the already rain-soaked northwest Missouri could occur during an Army Corp of Engineers' water release out of a reservoir.
On Thursday, the Department of Natural Resources closed the campground at Lewis and Clark State Park until further notice because of flooding.
Holt saw an estimated 12 inches of rain in 42 minutes on the evening of June 22, 1947.
The National Weather Service Storm Prediction Center issued the watch at 2:45 p.m. It covers 45 counties from Boone County north to the Iowa line and west through Kansas City.
People dealt with Tuesday's sweltering temperatures with cool drinks, cooler water and cacti.
Temperatures in Columbia are expected to hit 96 degrees on Tuesday.
This week's forecast calls for temperatures in the 90s with heat index levels that will make it feel even hotter. The National Weather Service suggests taking measures to prevent injury, and Columbia has set up cooling centers around the city.
MoDOT says roadways have already begun to buckle in parts of Missouri since the sweltering weather arrived last week.
Before 3 p.m. Saturday, wind caused a tree to fall onto Broadway by the College Avenue intersection on the Stephens College campus.
Much of the state is under a heat advisory until at least Monday evening as temperatures in the 90s combine with high humidity to create a heat index of around 100 degrees.
Instead of Canoe for Clean Water, experts will teach about river flooding and ecology from 10 a.m. until 1 p.m. Saturday at Katfish Katy's boat ramp.
The flood level, along with faster river flow, might cause the cancellation of Saturday's race, but the festival would still go on as planned.
A downpour Friday morning prompted the advisory. The National Weather Service said locations along Hinkson Creek downstream from Columbia can expect flooding.
Rich Mathews of The Associated Press got an exclusive look at the spill by joining the dive team that explored how the oil is impacting the Gulf of Mexico.