Millions at risk for flash flooding as massive storm system moves through Florida

A massive storm system is moving through Florida, putting millions at risk for flash flooding in the region. Officials lowered the water level in more than 2,000 miles of canals to lessen the flood risk. NBC News’ Marissa Parra has the story. » Subscribe to NBC News: NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features , , , Nightly News, Meet the Press, Dateline, and the existing apps and digital extensions of these respective properties. We deliver the best in breaking news, live video coverage, original journalism and segments from your favorite NBC News Shows. Connect with NBC News Online! Breaking News Alerts: Visit : Find NBC News on Facebook: Follow NBC News on Twitter: Get more of NBC News delivered to your inbox: #Storm #Weather #Florida