The newest hurricane that could threaten North America intensified Monday, though its future path remains uncertain. 


Hurricane Irma has strengthened into a Category 4 storm as it approaches the northeast Caribbean. 


The storm's center is 490 miles east of the Leeward Islands late Monday afternoon. It has maximum sustained winds of 130 mph and is moving west at 13 mph. 


Emergency officials are warning that Irma could dump up to 10 inches of rain, unleash landslides and dangerous flash floods and generate waves of up to 23 feet as the storm draws closer

Source: NNA