From experience I'd turn off my Ac, TV, and other electrical items when I know the Cat 1,2,3 is coming across. I've learned when back in the day when the power goes out my TV got fried when we were watching TV. Having surge protector outlets help but better safe than sorry I turned off my AC so that doesn’t get fried when the power goes out. Our neighbors were really worried about the guy down the street at that time who had roof solar panels. Those could be flying missles in a Cat 3. A number of neighbors cleaned out a lot of stuff out of their garage to squeeze their two vehicles to fit inside. Good luck to you.