Agree VVHT! Mary Gate of Heaven is a great place to donate! Not only are they helping in Negril, they serve several churches in other communities.
Other charities:
World Central Kitchen - they are feeding lots people and employing local chefs/restaurants to cook for many communities throughout Jamaica.
One Love Brigade is a nonprofit organization from Minnesota that does wonderful things for Negril & surrounding communities on the regular. In addition, they will now be providing food bags.
Please donate if you can!