..and if, like many residents of the Boston area, you don't have air conditioning, it's hot inside as well. Here are some tips from the CDC on keeping yourself and people you care about safe in hot weather. Greatist has a list of tricks for cooling down on hot summer nights. Lifehacker.com explains how to cool off by using low-tech ways to lower your body temperature. Want to get out of the house? Consider one of these local swimming pools.