ST. JOHN’S, Antigua (AP) — After battering Cuba early Saturday and leaving more than 20 dead across the Caribbean, newly strengthened Irma is taking aim at south Florida with 160 mph (257 kph) winds as another hurricane follows close behind. Irma regained Category 5 status late Friday as thousands of people in the Caribbean fought desperately to find shelter or escape their storm-blasted islands and more than 6 million people in Florida and Georgia were warned to leave their homes. Puerto Rico, the Dominican Republic and the eastern part of Cuba reported no major casualties or damage by mid-afternoon Friday after Irma rolled north of the Caribbean’s biggest islands. Many residents and tourists were left reeling after the storm ravaged some of the world’s most exclusive tropical playgrounds, known for their turquoise waters and lush green vegetation.