That is incredible about your geraniums. I've planted some desert type plants which flower this time of year, but I continue to be amazed that the geraniums don't get zapped in this heat. I think I put them into our AZ Room when the temps dropped to freezing; I can't quite remember. The AZ Room is still pretty cold, but a little more protected. No cellars in 99% of the homes here, too bad!
I could make some good shark traps down there.