Jamaica is bracing for what the National Hurricane Center said would be catastrophic flash flooding and landslides caused by up to 40 inches of rain.

Hurricane Melissa intensified to Category 5 strength Monday as it neared Jamaica with up to 30 inches (76 centimeters) of rain and a life-threatening storm surge.

“If those rains were to occur, you’re talking about catastrophic flooding potential,” said Jamie Rhome, the center’s deputy director.