I live near Dallas, so I feel your pain....will be 98 today, I think....We had to get a new AC unit three summers ago, and just paid it off!! They are very expensive!! Last summer, we found out our city would give a rebate if you got new insulation. We've lived in our house for 15 years, and we had not a clue if new insulation had ever been put in the attic or not...well, we did....it cost us $900 but we got a $300 dollar credit on our next utility bill. I think it has helped tremendously with the energy costs....We'll see for sure when I get my next bill because this has been a hotter summer than last. New insulation is a lot cheaper than a new AC unit....