Natural disasters. In the early 90s a blizzard knocked out power on the US eastern seaboard for weeks in some areas. Two years ago Texas's grid was compromised

Natural disasters. In the early 90s a blizzard knocked out power on the US eastern seaboard for weeks in some areas. Two years ago Texas's grid was compromised for nearly a week during the ice storm, and even cell service was down. I'm sure there are other examples. How long was power out in New Orleans after Katrina? Puerto Rico after Maria?