SAN JUAN, Puerto Rico (AP) — Tropical Storm Ernesto battered the northeast Caribbean on Tuesday as it took aim at Puerto Rico, where officials shuttered schools and government agencies.

The storm was located some 350 miles (565 kilometers) east-southeast of San Juan, Puerto Rico on Tuesday morning. It had maximum sustained winds of 40 mph (65 kph) and was moving west at 20 mph (31 kph).

“It’s not a hurricane, but it will bring heavy rains regardless,” Gov. Pedro Pierluisi said as he urged people to seek shelter by early Tuesday evening.

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He activated the National Guard as crews across the island visited flood-prone areas and elderly residents as part of last-minute preparations.

Forecasters have warned of widespread flooding and possible landslides, with six to eight inches of rain forecast for Puerto Rico and the U.S. Virgin Islands, and up to 10 inches in isolated areas. Tropical storm warnings were in place for Puerto Rico, Vieques, Culebra, the U.S. and British Virgin Islands, St. Kitts, Nevis, Montserrat, Antigua, Barbuda, Anguilla, Guadeloupe, St. Martin, St. Barts and St. Maarten.

The National Hurricane Center said Ernesto is forecast to move over or near Puerto Rico and the U.S. and British Virgin Islands on Tuesday evening.

Officials in Puerto Rico warned of widespread power outages given the U.S. territory’s crumbling electric grid, which crews are still repairing after Hurricane Maria razed it in September 2017 as a Category 4 storm.

Outages also were a concerned in the neighboring U.S. Virgin Islands for similar reasons, with blackouts reported on St. Thomas and St. John on Monday ahead of the storm.

“Don’t sleep on this,” said U.S. Virgin Islands Gov. Albert Bryan Jr., whose administration announced early Tuesday that it was closing all schools.

Early Tuesday, Ernesto drenched the French Caribbean island of Guadeloupe, where officials closed several main roads and urged people to stay indoors as they warned that the quality of potable water would be affected for several days.

Ernesto is the fifth named storm of this year’s Atlantic hurricane season. It is forecast to strengthen into a hurricane early Thursday over open waters on a path toward Bermuda.

The National Oceanic and Atmospheric Administration has predicted an above-average Atlantic hurricane season this year because of record warm ocean temperatures. It forecasted 17 to 25 named storms, with four to seven major hurricanes of Category 3 or higher.