Though it doesn't take a hurricane to lose electrical power, Harvey and Irma are further proof that extended power outages can be fatal to your fish. As I've discovered over the past several days, lots of cichlidophiles have suffered extensive fish loss because of a lack of power due to these two devastating hurricanes. While a minimal catastrophe in the grand scheme of things, it is extremely unfortunate yet preventable.
I've posted about how you can be prepared for power outages, at least short ones. See this post from back in March and this post from May for more information on being prepared for power outages.
The Cichlid Room Companion
Tropical Fish Hobbyist
American Cichlid Assoc.
African Cichlid Hub