If you find yourself without air conditioning, and it's in the heat of the day, go to a place where air conditioning is publicly available, for example, go to your local library. You'll learn something, and you'll stay alive at the same time. Staying hydrated with a sports drink or water will help with the heat, as well but it s important to avoid sodas and alcohol because both will dehydrate instead of hydrate.
If you are outside, and need a break from the sun, find a shady place and don't forget to wear your sunscreen.
Lastly, don't forget about your much loved pets and elderly. Pets and the elderly need extra care during hotter days. Subsequently, be sure to check up on your elderly family members, especially if they live alone and do not have AC. As a pet lover, I also emphasize again to look out for your pets, as even the pavement can be extremely hot on their paws.
A good rule of thumb; if it seems hot to you, it's probably too hot for them! So make sure to keep pets’ water bowls full so they can stay hydrated too.
Keep safe a have a great summer!