A:Answer Thanks for asking, Julie. Yes, the Nest Thermostat Gen 4 can protect your home during extremely cold or hot weather. With Safety Temperatures, when your home reaches a set temperature limit, your thermostat will turn on heating or cooling even if the thermostat is set to Off. If the room temperature drops below or above the set Safety Temperatures, and your Nest thermostat automatically starts heating or cooling, you'll get a notification sent to your phone. Here’s a guide with more information: https://support.google.com/googlenest/answer/9244826