Extreme Temperatures

What it is

Extreme temperatures include periods of dangerous heat or severe cold. These conditions can create health risks, especially for older adults, young children, people with medical conditions, outdoor workers, and people without reliable heating or cooling.

Why it matters in Tennessee

Tennessee can experience hot, humid summers and periods of winter weather with freezing temperatures. Extreme temperatures can strain power systems, affect transportation, and increase the risk of heat-related illness, hypothermia, and other health emergencies. The Tennessee Department of Health reports that at least 2,000 emergency department visits in Tennessee each year can be attributed to extreme heat and heat-related illness. 

What to do before

  • Know where you can go to stay cool during extreme heat or warm during extreme cold.
  • Keep extra water, blankets, flashlights, batteries, and medications on hand.
  • Check heating and cooling systems before extreme weather arrives.
  • Sign up for local alerts and monitor weather forecasts.
  • Make a plan to check on family, neighbors, and people who may need extra help.

What to do during extreme heat

  • Drink water often, even if you do not feel thirsty.
  • Stay in air conditioning when possible.
  • Avoid strenuous outdoor activity during the hottest part of the day.
  • Wear lightweight, loose-fitting clothing.
  • Never leave children, pets, or anyone else in a parked vehicle.

What to do during extreme cold

  • Stay indoors when possible.
  • Dress in warm layers if you must go outside.
  • Keep generators, grills, and camp stoves outdoors and away from windows.
  • Use space heaters safely and keep them away from anything that can burn.
  • Watch for signs of hypothermia and frostbite.

What to do after

  • Continue checking on people who may need help.
  • Report power outages to your utility provider.
  • Avoid damaged trees, power lines, and unsafe heating equipment.
  • Restock emergency supplies used during the event.
  • Review what worked well and update your household plan.

Stay informed

Monitor local weather forecasts and follow instructions from local officials during extreme heat, extreme cold, and winter weather events.