Hurricane Rafael strengthened to a major Category 3 hurricane as it neared the coast of Cuba on Wednesday afternoon.
Rafael is expected to bring life-threatening storm surge, hurricane-force winds and flash flooding to the western part of the island.
A tropical storm warning is in effect for the Florida Keys, where heavy rain, gusty winds and even tornadoes are possible on Wednesday and into Thursday morning.
MORE: How accurate is hurricane forecasting? Meteorologists explain.Rafael will move into the Gulf of Mexico on Thursday and start weakening.
Rafael isn't posing a major threat to the U.S. Gulf Coast, but some of the tropical moisture could move toward the coast and add to the rain from an approaching cold front.
Most models predict Rafael sitting in the Gulf into next week and possibly moving southwest toward Mexico.
MORE: Before and after photos show Hurricane Beryl's destruction on the Gulf Coast of TexasAtlantic hurricane season lasts through Nov. 30.