Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.

A destroyed shack is seen in the Rio Piedras area, in San Juan, Puerto Rico, on September 21, 2017. 
Puerto Rico braced for potentially calamitous flash flooding on Thursday after being pummeled by Hurricane Maria which devastated the island and knocked out the entire electricity grid. The hurricane, which Puerto Rico Governor Ricardo Rossello called "the most devastating storm in a century," had battered the island of 3.4 million people after roaring ashore early Wednesday with deadly winds and heavy rain.
 / AFP PHOTO / HECTOR RETAMAL        (Photo credit should read HECTOR RETAMAL/AFP/Getty Images)
A destroyed shack is seen in the Rio Piedras area, in San Juan, Puerto Rico, on September 21, 2017. 
Puerto Rico braced for potentially calamitous flash flooding on Thursday after being pummeled by Hurricane Maria which devastated the island and knocked out the entire electricity grid. The hurricane, which Puerto Rico Governor Ricardo Rossello called "the most devastating storm in a century," had battered the island of 3.4 million people after roaring ashore early Wednesday with deadly winds and heavy rain.
 / AFP PHOTO / HECTOR RETAMAL        (Photo credit should read HECTOR RETAMAL/AFP/Getty Images)

    JUST WATCHED

    Drone video shows Puerto Rico devastation

MUST WATCH

Drone video shows Puerto Rico devastation

CNN's Leyla Santiago reports on the devastation from San Juan.

Drone video shows Puerto Rico devastation

CNN's Leyla Santiago reports on the devastation from San Juan.