As many as 13,000 homes in the Bahamas may have been destroyed or severely damaged, the International Federation of Red Cross and Red Crescent Societies said.
Over half a million Jews live in South Florida and areas such as Palm Beach, Florida.
Dorian strengthened into an extremely dangerous category 4 hurricane, the US National Hurricane Center said on Friday.
Dorian is expected to strengthen and slam the Bahamas and the southeastern United States with rain, strong winds and life-threatening surf over the next few days.