Explained: Storms that caused 1-in-1,000 year flood event in Tennessee and Georgia move up Atlantic coast

A storm system caused a catastrophic, 1,000-year flood along the Tennessee-Georgia state line and moved up the Eastern Seaboard, prompting flood advisories from North Carolina to Massachusetts

1,000-year flood event

A flood with a 0.1%, or 1 in 1,000, chance of occurring in a given place in any given year

swift-water teams

Rescue crews trained to operate in fast-moving floodwaters

hydroelectric dams

Dams that generate electricity using the force of flowing water