Many cool lights are sold in the market. Buy and use them this summer, you won't be able to stand the heat in the house and they will also reduce the room temperature. It is best to avoid using TVs and computers in your home when using this. Also, turn off all electrical appliances when not needed.
Open windows at night
Open the windows of the house at night and place a table fan next to the window. This will bring natural air into the room.
Note: More than everything mentioned above, wear cotton clothes in summer, drink plenty of water, and eat cool fruits, buttermilk, and cucumbers. Because these will help keep us cool even in summer.