Parts of Florida still reeling from severe flooding

Extreme flooding is causing major problems for portions of southern Florida after some areas saw nearly two feet of rain. Meanwhile, millions in the northeast were under threat for severe weather. NBC News’ Sam Brock has the latest on the extreme weather from coast to coast. » 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: http