Service technicians say air conditioning units are working double time. E. L. Walters Air Conditioning and Heating says if you set your thermostat to a higher temperature while you're at work during the day, then bring it down to a more comfortable temperature when you arrive home. The air conditioner won't be able to keep up with the demand. Your best bet is just to keep the temp low all day, even if it'll cost you a little more on your electric bill.
"It's not going to be able to keep up," said Lon Walters of E.L. Walters. "A/C equipment in this area is designed for 94 degress. When we hit 107, that's a temperature difference we can't get to. If you go home, and your house is 80 degrees, and you've got it set to 72, don't be surprised."
Walters says the high demand won't actually do any damage to your system. It just won't be able to cool down to the temperature you want it because it's working so hard.