No one was injured and the driver reportedly jumped out of the truck. The accident occurred about 10:30 pm.
The truck was reportedly on its way to provide relief for residents in communities in and around Anse La Raye/Canaries who have been without water mainly due to the Christmas Eve flooding.
The muddy and wet conditions of the road have been blamed for the accident.
An eyewitness said: “I saw the truck skidding down and just capsized. The driver tried hard to keep it on the road but no hope. The driver jumped out. 5000 gallons of water is being wasted right now and I need water.”