Drinking water and keeping your body hydrated is the most effective way to fight heat waves. Do not consume excess alcohol or caffeinated drinks to avoid dehydration. 

Make sure you only go outside in the sun when necessary. Stay indoors during the extremely hot hours of the day. 

Do not do exhausting physical activities during the day if not necessary. If you need to do them, make sure you take regular breaks and drink plenty of water.

Cover your skin, hair, and eyes from the sun. Only wear light-coloured loose cotton clothing.