Ten people are dead in the United States and 35 have been killed in the Caribbean in the wake of the storm. Since then, Irma has been weakening, but continues to wreck havoc across the peninsula and into Georgia as it tracks north.
Authorities say a Florida man appears to have been electrocuted by a downed power line following Irma.
Power losses in Georgia, which were at about 152,000 as of 8:45 a.m. EDT, were expected to increase as the storm moved north.
Jose has maximum sustained winds of 75 miles per hour and is moving east at 6 miles per hour, according to the advisory.
Irma made landfall at Cudjoe Key just after 9 a.m. Sunday.
In Miami-Dade, Irma's fierce winds bent a construction crane in half, tore a roof off a gas station and left streets throughout the county littered with felled trees and palm fronds. The Florida cities of Jacksonville and Orlando were especially hard-hit by floodwaters.More news: Catholic Priest free after 16 months in terrorist captivity
Trump also spoke with the governors of Alabama, Georgia, South Carolina and Tennessee - four states in Irma's path.
"Check with local officials before returning home to make sure you can safely do so", Scott said Monday. "It's awful what we saw".
Florida Power & Light has projected that more than 80 percent of its 10 million customers across Florida -- 4.1 million of its 5 million customer accounts -- may experience power outages as the storm crosses the state.
Hurricane Harvey unleashed extensive damage in southern Texas and parts of Louisiana as it brought excessive rainfall and catastrophic flooding, killing at least 74 people. Most of that will be confined to areas along and south of Interstate 44.
What's happening in the Florida Keys?
In fact, strong riptides are possible in the NY area during the coming weekend. The National Guard also has arrived in the island chain amid official fears that a humanitarian crisis may be developing in the stricken region. "It is time to take this storm seriously". More than 4,200 USA flights scheduled for Monday were cancelled.
"Anyone who didn't heed the evacuation orders here in Miami Beach, it's time to bunker down", Van Dam said. There is another powerful hurricane that we are monitoring out in the Atlantic and Jose could become a threat to the east coast.