Hurricane Humberto has rapidly intensified into a Category 4 storm with 145 mph winds in the Atlantic. South Carolina’s governor and Charleston’s mayor have declared states of emergency as a separate tropical system is forecast to approach the Southeast U.S. coastline early next week. Florida’s east coast is under a tropical storm watch, with officials warning of dangerous surf, flooding, and power outages. Emergency crews are preparing pumps, barricades, and rescue teams as residents are urged to stay vigilant.