Hospitable neighbors with AC are your friends.
OK, that one's not really gonna work, but I wanted to jump on the '___is your friend' train.
A few heat survival tips that sort of work (by sort of, I mean they work for me, but I can't necessarily prove their efficacy)...
Drink hot drinks. This one's frequently debated, but my personal experiments have confirmed its veracity. NPR agrees:
http://www.npr.org/blogs/thesalt/2012/07/11/156378713/cool-down-with-a-hot-drink-its-not-as-crazy-as-you-thinkLock in the cold. When you use a shower to regulate body heat, the last 10 seconds or so should be the opposite temperature. So in the winter, if you're in a hot shower, you turn the water over to cold real quick before you hope out. the chill will tell your body it needs to keep all that heat it just collected. In the summer, take a cold shower, and blast yourself with hot water at the end. Your body will want to return to the equilibrium it established in the cold shower, and will work to expel heat. Honest confession: I got this idea from a Dan Brown novel and have no sources, but it totally works for me.
Layer up. The biggest challenge to hedonic adaptation for me is that my workplace has AC. If I wear my summer-ish clothes (thin pants, short sleeves) to work, the Kansas heat feels downright oppressive when I get home. If I wear a full suit, I stay generally warm at work, and then when I get back to my house, I can switch to shorts and a t-shirt and feel instant relief.