Hurricane Rafael has turned to the west after lashing Cuba, where it knocked out the country’s electrical grid, leaving its 10 million residents in the dark. Rafael had strengthened to a Category 3 hurricane before it made landfall in the Cuban province of Artemisa, and weakened to a Category 2 shortly after making landfall Wednesday afternoon.

The magnitude of the impact remained unclear through the early hours of the day, but forecasters warned that Hurricane Rafael could bring “life-threatening” storm surges, winds and flash floods to Cuba after ravaging parts of the Cayman Islands and Jamaica.