Personnel from five equine industry organizations are working together to bring food, water, and veterinary services to horses stranded in hurricane-ravaged Puerto Rico.

Hurricane Maria slammed into the U.S. territory on Sept. 20 packing 155 mile-per-hour winds and driving rains that knocked out virtually all of the island’s power and destroyed many of its structures.

About 950 racing and non-racing horses were evacuated to the Hipódromo Camarero racetrack, in San Juan, ahead of the storm. But amid the destruction, some were abandoned by their caretakers without food, water, or basic care, said Marty Irby, senior advisor of equine protection and rural affairs for the Humane Society of the United States (HSUS).

Days after Maria moved on, Caribbean Thoroughbred Aftercare confirmed that four horses had died as a result of the lack of resources