LATEST: "Catastrophic flash flooding occurring over portions of Puerto Rico," NHC says as Hurricane Maria moves off northern coast pic.twitter.com/XHmrcNgFIj— NBC News (@NBCNews) September 20, 2017
LATEST: "Catastrophic flash flooding occurring over portions of Puerto Rico," NHC says as Hurricane Maria moves off northern coast pic.twitter.com/XHmrcNgFIj