I'm late to this party because I'm on the other side of the planet in a sub-tropical climate. I agree with the commenter from India and want to add:
• if you have a cotton cap / beanie / soft hat, get it out Wet it, wring it out, and put it in your freezer in roughly the right shape for your head. Use whatever is in the freezer to shape it, then let it freeze. Remove from freezer, put it in your head, and thank me for the brief but blessed relief.
• Wear a light cotton long sleeve top. Wet the sleeves and stand or sit in front of a fan or in a breezy spit in the shade. It's like air conditioning for your skin.
• Wet your head for instant relief. Your wet hair will help keep you cool for longer.
• Plan your day around the heat. If you have to go out, do it as early in the day as you can to avoid the heat. Stay in the shade as much as possible, but somewhere with good air flow
Here in Australia a lit of road construction works are carried out overnight in the summer. This helps beat the heat, which improves safety, but also improves safety by ensuring work is being carried out when there's the least amount of traffic next to the work zones.