If the power goes out while you are using your CPAP machine, don’t panic. Modern CPAP masks often include an anti-asphyxia valve, which will allow you to breathe room air. You may wake up due to the lack of airflow, but you will still be able to breathe. If you have a battery backup or an alternative power source like a generator, connect your CPAP machine to it immediately to resume your therapy. If not, try sleeping in a position that reduces apnea episodes, such as on your side.