Extreme Heat Safety in Missouri

Missouri summers often bring dangerous combinations of high temperatures and humidity. Extreme heat is one of the deadliest weather hazards, both in our state and across the country.

In 2023, Missouri reported 34 heat-related deaths, with victims ranging from infants to seniors. Nationally, more than 700 Americans die from extreme heat each year, according to the CDC — with actual numbers likely higher due to underreporting or complications involving existing health conditions.

Who’s Most at Risk?

Older adults, young children, and people with chronic health conditions are especially vulnerable during extreme heat. Over 50% of heat-related deaths in Missouri from 2000 to 2009 occurred among individuals 65 and older, many of whom lived alone or didn’t have access to air conditioning.

Know the Terms

Term Description
Heat Wave A prolonged period of dangerously high temperatures, often with humidity.
Heat Index What the temperature feels like when humidity is factored in.
Heat Cramps Muscle pains/spasms from exertion in hot conditions. An early warning sign.
Heat Exhaustion Caused by heavy sweating. Symptoms: fatigue, nausea, dizziness. May lead to heat stroke.
Heat Stroke A life-threatening emergency. The body loses its ability to regulate temperature. Immediate medical help is required.

How to Prepare Before Extreme Heat

  • Install air conditioners properly; insulate any gaps.

  • Cover windows with drapes, blinds, or reflective materials.

  • Seal gaps with weather-stripping to keep cool air in.

  • Clean or change air filters monthly.

What to Do During Extreme Heat

  • Stay indoors and avoid sun exposure during peak hours (10 AM to 4 PM).

  • Use public cooling centers if needed (call 211 for locations).

  • Drink water regularly — avoid alcohol, caffeine, or sugary drinks.

  • Eat light meals and avoid excess salt unless directed by your doctor.

  • Wear loose, light-colored clothing and use sunscreen.

  • Never leave children or pets inside vehicles — even briefly.

  • Check on elderly neighbors, friends, or relatives without air conditioning.

  • Avoid strenuous activity; if you must work outside, take frequent breaks and use the buddy system.

Staying Cool Without Air Conditioning

  • Open windows early in the morning and again in the evening to let cooler air in.

  • Keep windows and blinds closed during the hottest part of the day.

  • Use ceiling and floor fans to circulate air.

  • Sleep in cooler areas like basements or lower floors.

  • Avoid using ovens, dryers, or other heat-producing appliances during the day.

Stay Informed

  • Monitor local news, weather apps, or NOAA radio for heat advisories.

  • Sign up for CodeRED alerts at WarrenCountyEMA.com or call 636-456-3786 for assistance