If you don't have an air conditioner, take a cold shower to keep your body cool. You can also use a spray bottle or a sponge to keep your body wet.
Wear loose-fitting cotton clothes and avoid wearing too many accessories or jewellery.
Drink plenty of fluids to keep yourself hydrated throughout the day. Try out sports drinks that have electrolytes.
Avoid going outdoors when the heat is at its peak. Cancel or reschedule meetings, if possible.
If stepping out, keep a wet towel on your head to avoid coming in contact with direct sunlight.
Avoid hot and heavy meals. Try consuming fresh fruits and vegetables that do not take a lot of time to digest.