My town's power went out for a full day during a heatwave

It was 102 degrees in Phoenix last Thursday, and our whole block lost electricity from noon until midnight. We had to use a battery pack to keep a fan going and ended up talking with neighbors outside instead of blasting the AC. What's your backup plan for staying cool without cranking the power?

I was putting the vapor barrier on the wrong side of the insulation for years until a guy in Maine asked me why.