Greater Regional Medical Center, a hospital in Creston, Iowa, has been hit by a band of severe weather.
Neighboring Kansas and Oklahoma are under a high risk of severe weather through Saturday night with tornadoes possible.
The temperatures are expected to go below freezing early Wednesday morning in Columbia. The low temperatures might result in patchy frost.
The National Weather Service confirmed at least two separate "large and extremely dangerous" tornadoes in the Dallas-Fort Worth area.
Last month's average temperature of 59.7 broke the previously held 1946 record of 56. The high temperature also reached or exceeded 80 during eight days throughout the month, tying the previous record set in 1910.
In a test that starts Monday, five weather service offices in Kansas and Missouri will use words such as "mass devastation," ''unsurvivable" and "catastrophic" in a new kind of warning that's based on the severity of a storm's expected impact.
The Intergovernmental Panel on Climate Change forecasts stronger tropical cyclones and more frequent heat waves, deluges and droughts. It warns that the greatest threat from extreme weather is to highly populated, poor regions of the world.
So far this March, the monthly average temperature set a record high for Columbia. The average temperature through Sunday for March is 57.8 degrees, and the National Weather Service said temperatures are on track for a monthly average of 59.3 degrees.
Stormaware.mo.gov includes information about tornado sirens and weather alert radios and videos on how to effectively take shelter. It also offers text-message alert services.
Thunderstorms and high winds have incited state servicemen in Missouri, Arkansas, Oklahoma and Kansas to take precautionary measures.
The National Weather Service issued flood warnings for Barton and Vernon counties in Missouri.
The temperature in Columbia hit 85 degrees Wednesday, toppling the record of 82 degrees set in 1971. The last time it was that warm in Columbia was Sept. 13, when the temperature climbed to 91 degrees.
The forecasted high of 84 would surpass the record high for March 14 by two degrees.
Warning sirens will sound at 1:30 p.m. throughout Boone County. The drill is part of "Severe Weather Awareness Week."
FEMA has denied a request to provide disaster aid to 18 counties in Missouri recently hit by violent weather. Gov. Jay Nixon said the state will continue to provide aid to those communities.
Many Columbia residents went outside Tuesday to enjoy the warm, sunny weather. The temperature reached a high of 75 at Columbia Regional Airport. Some families took advantage of the pleasant conditions and visited Flat Branch Park.
After an extended negotiation time period with the city in January, the CodeRED system did not send alerts to subscribed residents of the city.
Warm, dry weather will combine with stiff winds to create a fire hazard.
After surviving the deadly tornado that killed both parents and her siblings, 15-month-old Angel Babcock died in Kosair Children's Hospital.
At least 38 people were killed in five states in the second spate of storms in little more than 48 hours. They scarred the landscape over hundreds of miles, leaving behind a trail of shredded sheet metal, insulation, gutted churches and crunched-up cars.