The Barbados government has issued a hurricane warning for the Caribbean island of Dominica as Tropical Storm Maria made its way west-northwest, the U.S. National Hurricane Center said on Sunday.

The storm, which the forecaster expects to reach hurricane status later Sunday, also prompted the island of St. Lucia to issue a tropical storm warning.

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Maria was about 450 miles (720 km) east-southeast of the Leeward Islands at 11 a.m. E.T., with maximum sustained winds of 65 miles per hour.

Some of the islands devastated by Hurricane Irma earlier this month have issued watches for Maria.

Maria was about 410 miles (655 km) east-southeast of the Lesser Antilles islands with maximum sustained winds of 65 miles per hour at 8 a.m. EDT (1200 GMT), the NHC said.

“Strengthening is forecast during the next 48 hours,” the forecaster said.

Hurricane conditions are possible by Monday night or Tuesday in Antigua, Barbuda, St. Kitts, Nevis, Montserrat, Guadeloupe, Dominica, Saba, St. Eustatius, Saint Maarten, St. Martin, St. Barthelemy and Anguilla, according to the NHC.

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Tropical storm conditions were possible on Monday in those areas as well as Martinique, St. Vincent and the Grenadines.