Jose passed north of the Caribbean islands and Puerto Rico on Sunday as a Category 4 hurricane.
Almost 4.5 million homes and businesses across Florida lost power, and utility officials said it will take weeks to restore electricity to everyone. That toll included 10 killed in Cuba and state media said most of those died in Havana, where seawater surged deep into residential neighbourhoods.
About 6.5 million homes in Florida, two thirds of the total, are without power after Hurricane Irma cut a deadly path through the U.S. state, officials say.
Hurricane Jose winds have since decreased to near 75 miles per hour (120 km/h) with higher gusts, just above the 74 miles per hour threshold for category 1. Tropical storm conditions are possible on the Treasure Coast throughout the day Monday with showers and possibly a thunderstorm.
Irma is now heading into Georgia, and is expected to continue to weaken as it makes its way to Alabama and Tennessee.
Duke's outages jumped to more than 860,000 overnight; the company said they could ultimately exceed 1 million.
FPL said its two nuclear plants were safe. He made his way down to Florida last week ahead of Hurricane Irma. Roads were flooded, but city spokesman Zachery Good said the majority of Homestead's mobile homes were spared destruction. It took power crews two hours to disconnect the electricity so the mane could escape the auto. The plant's other reactor, Unit 2, continued to operate at full power. Florida Gov. Rick Scott flew over the hard-hit but isolated Keys on Monday and said he saw "devastation" that included boats washed ashore and mobile homes pummeled by the storm.
Irma tied Florida Keys (1935), Gilbert (1988), and Wilma (2005) for the second strongest maximum winds of all-time for an Atlantic hurricane when it topped out at 185 miles per hour. In the Atlanta metro area, about 496 stations, or 12.2 percent, were out of gasoline, according to information service Gas Buddy.