Saint Louis University

If the weather is extremely hot:

  • Stay indoors as much as possible and limit exposure to the sun.
  • Stay on the lowest floor out of the sunshine if air conditioning is not available.
  • Consider spending the warmest part of the day in public buildings such as libraries, movie theaters, shopping malls, and other community facilities.
  • Circulating air can cool the body by increasing the perspiration rate of evaporation.
  • If possible, avoid strenuous outdoor activities, particularly between 10 a.m. and 4 p.m. when the sun's rays are strongest.
  • Use a buddy system when working in extreme heat.
  • It may be uncomfortable, but wear loose-fitting, lightweight, and light-colored long sleeve shirts and long pants that cover as much skin as possible.
  • Protect the face, eyes and head by wearing UV protective sunglasses, and a hat to protect your skin and corneas.
  • Apply sunscreen with an SPF of 15 or more if you go out with exposed skin.
  • Take frequent breaks and stay hydrated to prevent heat exhaustion.
  • Eat well-balanced, light, and regular meals. Avoid using salt tablets unless directed to do so by a physician.
  • Restrict or limit the number of caffeinated or alcoholic beverages you drink. These will dehydrate the body quicker. Drink plenty of water.
  • Persons who have epilepsy or heart, kidney, or liver disease; or are on fluid-restricted diets; or have a problem with fluid retention should consult a doctor before increasing liquid intake.
  • When on vacation or on a trip, take a supply of water in case you break down on the road.
  • Check on family, friends, and neighbors who do not have air conditioning and who spend much of their time alone.
  • Never leave persons or animals alone in closed vehicles.

If you believe you or someone else is suffering the affects of heat exhaustion or heat stoke contact the Department of Public Safety & Emergency Preparedness at (314) 9770-3000 or 9-1-1, followed by an immediate call to DPSEP.  

Heat exhaustion:


  • Heavy sweating; paleness; muscle cramps; tiredness; weakness; dizziness; headache; nausea; fainting; fast, weak pulse; fast, shallow breathing
  • If left untreated, heat exhaustion can lead to heat stroke, a more serious health risk.


  • Remove the person to a cool place.
  • Give plenty of cool water or sports drink.
  • Have them take a tepid or cool short shower, and have them rest.
  • Call a doctor if symptoms persist.

Heat stroke: a type of hyperthermia with elevated body core temperature; can be fatal!


  • Heat stroke can also mimic the signs of a heart attack or stroke.
  • High body temperature; absence of sweating with hot red or flushed dry skin; rapid pulse; difficulty breathing or pain; strange confused behavior; hallucinations; disorientation; seizures; comatose.


  • Call the Department of Public Safety & Emergency Preparedness at (314) 977-3000 or call 9-1-1 followed by an immediate call to DPSEP for emergency medical services. 

Modified from FEMA information