HAVANA (Reuters) -Tropical Storm Rafael gained steam late on Monday as it churned northward toward Cuba, which is still struggling to recover from a nationwide blackout and hurricane two weeks ago.

The National Hurricane Center forecasts Tropical Storm Rafael to grow into the season’s 11th hurricane Tuesday as it moves toward Cuba with winds and storm surge expected to affect the Florida Keys this week.

Tropical Storm Rafael is passing south of western Jamaica and is forecast to strengthen into a hurricane possibly by Tuesday evening.Rafael, which formed Sunday and was previously known as Potential Tropical Cyclone 18,