Before – Be prepared
Check your appliances and devices
Heat can be tough on the electrical appliances and devices in a home, so make sure that everything is functioning as it should before the heat wave arrives. Take any portable fans out of storage, test that they still work, and position them strategically around the house. Check that your refrigerator and freezer are both cooling properly and confirm that your air conditioner is set to cool, that it turns on, and that it runs without problem. You should clean the air conditioner filter as well.
Check for air leakage
If you have drafty windows and doors, then you are going to have a hard time keeping the heat out. Your central air conditioner also won't work as effectively. Inspect your weatherstripping and replace it if it has seen better days. For homes with a window-mounted air conditioner, make sure that the unit is snug to the window and that there is no chance for air leaks around it.
Set and monitor pool temperature
As the temperatures outside begin to creep up, so will the temperature in your pool. Beat the heat by setting your pool to a comfortably cool temperature ahead of time and monitor it with a pool thermometer.