 Brutal. The ACs and fans are doing their job, probably overloading the system. Dr. Kwame Okoto with Kaiser Permanente says there are ways to turn off the AC and beat the heat while you sleep. First, fire up the fan. That's a great way to keep your body cool overnight. If you've got windows in your bedroom, it may be a good idea also to open those up and try to get some more airflow as well.