Drink lots of water, wear cool loose clothing & a hat, stay out of the sun when it's the hottest between 10am-2pm.

try to be a snow dragon :D kidding of course. my country is very hot too.. totally agree with Jura! if you have to be outside during the day , try to cover yourself with linen clothes , i mean all your body to avoid drying your skin by evaporation . cover your head.

go on a beach? :D