Jefferson City, Mo. (KFMO) - Missouri emergency management and weather officials are encouraging residents to prepare for summer weather hazards as the state observes Summer Safety Day on Friday, June 5, 2026.
Although summer officially begins June 21, many Missourians have already experienced unusually warm conditions this year, including a historic early-season heat wave in March that brought temperatures into the 90s.
The Missouri State Emergency Management Agency (SEMA) and the National Weather Service are using Summer Safety Day to remind residents about the dangers associated with extreme heat, high humidity, and severe summer weather. Officials say humidity can make temperatures feel significantly hotter through the heat index, increasing the risk of heat-related illnesses.
SEMA Director Jim Remillard emphasized the importance of planning ahead and paying close attention to weather forecasts, especially as Missouri prepares to welcome thousands of visitors during World Cup events in Kansas City.
"Especially for more vulnerable groups like children, the elderly and those with pre-existing medical conditions, we must remember that these seasonal hazards stress the body, sometimes very quickly," Remillard said.
According to the Missouri Department of Health and Senior Services, 35 heat-related deaths were reported statewide in 2025. One of those deaths occurred while working outdoors, while five involved individuals left inside hot vehicles. Health officials note that 21 of those who died also had documented heart disease.
A heat stroke is considered a medical emergency and can occur when the body can no longer regulate its temperature. Symptoms include hot, dry skin, confusion, and loss of consciousness. Anyone experiencing signs of heat stroke should receive immediate medical attention by calling 911.
Officials are also stressing the importance of never leaving children or pets alone in vehicles. Even on relatively mild days, temperatures inside a parked vehicle can increase by 20 degrees in just 10 minutes.
In addition to heat concerns, summer is also the peak season for lightning-related fatalities because more people spend time outdoors. Emergency managers encourage residents to monitor weather forecasts and identify safe shelter locations before thunderstorms develop.
To reduce the risk of heat-related illness, officials recommend gradually acclimating to warmer temperatures, limiting outdoor activities during the hottest part of the day, staying hydrated, eating balanced meals, and wearing lightweight, light-colored clothing. Residents without air conditioning are encouraged to spend time in public buildings such as libraries, shopping centers, or community cooling centers.
Officials also encourage checking on elderly neighbors, friends, and family members during periods of extreme heat and ensuring pets have access to fresh water and adequate shade.
