I didn't have a great camera yesterday but I still want to mention one of the ways we tried to beat the heat.
I saw a recipe for Watermelon Granitas on Pioneer Woman and with a watermelon sitting in the fridge, the timing was just right.
I didn't have limes so I used a lemon and it came out great. Watermelon, cut up, then pureed with a little lemon juice and a couple tablespoons of sugar. Freeze it and scrape it up with a fork.