The storm brought torrential rain, flash flood warnings and has left more than a million people without power. Fiona could bring up to 30 inches of rain to Puerto Rico, which was hit by Hurricane Maria nearly five years ago.
Fiona is expected to strengthen and could hit Turks and Caicos as a Category 2 hurricane on Tuesday and threaten Bermuda later this week.
Several organizations already have teams on the ground providing assistance. You can help them here or by clicking the button below.