Your Care Instructions

Heat exhaustion occurs when you are hot, sweat a lot, and do not drink enough to replace the lost fluids. Heat exhaustion is not the same as heatstroke, which is much more serious. Heatstroke can lead to problems with many different organs and can be life-threatening.

After medical care for heat exhaustion, you will need to limit your activities and take good care of your body while it recovers.

How can you care for yourself at home?

• Reduce your activities, and get plenty of rest. Your doctor will give you instructions on when you can resume your normal schedule.
• Stay in a cool room for at least the next 24 hours.
• Drink rehydration drinks, juices, and water to replace fluids. Drinks such as sports drinks that contain electrolytes work best, because they have salt and minerals. You need salt and minerals as well as water. You are drinking enough fluids when your urine is normal in colour (light yellow or clear), and you are urinating every 2 to 4 hours. If you have kidney, heart, or liver disease and have to limit fluids or salt, talk with your doctor before you increase your fluid or salt intake.
• Avoid drinks that have caffeine or alcohol.

To prevent heat exhaustion

• Drink plenty of fluids, enough so that your urine is light yellow or clear like water. If you have kidney, heart, or liver disease and have to limit fluids, talk with your doctor before you increase the amount of fluids you drink.
• Drink plenty of water before, during, and after you are active. This is very important when it is hot out and when you do intense exercise.
• During hot weather, wear light-coloured clothing that fits loosely and a hat with a brim to reflect the sun.
• Limit or avoid strenuous activity during hot or humid weather, especially during the hottest part of the day (11 a.m. to 3 p.m.). Heat exhaustion and heatstroke usually develop when you are working or exercising in hot weather. Humidity makes hot weather even more dangerous.
• Cars can get very hot inside. Open the windows or turn on the air conditioning before you get in and close the doors.
• Try to stay cool during hot weather. If your home is not air-conditioned, seek an air-conditioned place. That could be in the library, a neighbourhood café, or a friend's home. Spray yourself with a cool mist. Take a cool shower, bath, or sponge bath.
• Be aware that some medicines, such as major tranquilizers, can raise the risk of heat exhaustion. Ask your doctor whether any medicine you take raises your chance of getting heat exhaustion.