VIDEOS have emerged showing a surging torrent of water in Puerto Rico as torrential rain and powerful winds brought on by Hurricane Maria increase the threat of widespread flooding.
Local media is reporting that the Fajardo, Espíritu Santo and Rio Grande de Loiza rivers have all broken their banks, increasing the risk of flooding to some of the more highly populated areas of Puerto Rico.
A tsunami warning is in place along the coast of Ponce, a city on the southern coast.
Flash flood warnings are in place for Comerio, Naranjito, Dorado, Toa Baja and Toa Alta as the island is smashed by Hurricane Maria.
Some local journalists are reporting that Río Grande de Loíza, Puerto Rico's largest river by volume, is already threatening some populated areas on the island.
At around 6pm BST officials announced the entire island, home to more than 3.5 million people, had lost power.