How do I prevent my baby from getting overheated at night?

The first thing to do if it's very warm out is to make sure that you don't overdress your baby. Newborns come home from the hospital, often with a little cap on but the recommendation is not to wear that for more than the first few days because very quickly, the infant body learns to regulate temperature and having their head bare is part of how they regulate temperature. It's a myth that babies need to be double-wrapped and overdressed. That can actually be a safety issue. Also, babies sleep better when the air is cool, so a prevention tip is to keep the air nice and cool.