It would depend on what type of natural disaster. In case of a tornado or hurricane, you need to take shelter in a room (preferably a basement) away from all windows. If you have enough time you should evacuate to a safer location. The power may go out for days at a time, so try to have a portable charger for phones, food that won't expire, and plenty of drinking water.
it would all depend on what kind of natural disaster lets say a tornado find a storm shelter