U.S. weather forecasters say Tropical Storm Emily is threatening Puerto Rico and several other Caribbean islands with possible flash floods and mudslides.

Forecasters with the U.S. National Hurricane Center say Emily was last reported 425 kilometers southeast of San Juan, Puerto Rico, with sustained winds of 65 kilometers per hour. Emily was moving west at 22 kilometers per hour.

Tropical storm warnings are in effect for Guadeloupe, Puerto Rico and the Dominican Republic. The storm is expected to bring up to 15 centimeters of rain to those areas, which have already seen recent heavy rainfall.

Storm watches are in effect for Haiti and the U.S. Virgin Islands.

Meanwhile, in the eastern Pacific, Hurricane Eugene is now a Category One storm, on the one-to-five scale of hurricane intensity. The storm is predicted to weaken by Wednesday.

Forecasters say Eugene is 720 kilometers southwest of Manzanillo, Mexico, and moving northwest at 24 kilometers per hour. No coastal watches or warnings have been issued. The storm is expected to remain at sea.