Waves of rain are expected to lash the U.S. this week, with forecasters warning of "generational" rainfall for some areas.

Yet again, another round of severe weather is set to threaten the central U.S. with damaging winds, large hail and tornadoes starting late Tuesday and continuing through Thursday.

Forecasters are warning of potentially deadly flash flooding and strong tornadoes as more rounds of thunderstorms are poised to strike parts of the Midwest and South. The potent storm system will bring the threat of “significant,

Flood Watch mean be prepared: A Flood Watch is issued when conditions are favorable for a heavy rainfall in the near future over a large area. Flash Flood Warning means take action: A Flash Flood Warning is issued when a flash flood is imminent or occurring. If you are in a flood prone area move immediately to high ground.

Spring storms will sweep heavy rain across parts of the region. Find out what each flood warning and watch mean.

AccuWeather meteorologists are issuing urgent warnings about a significant weather event expected to unfold across the central United States, bringing the potential for historic and life-threatening flash flooding and severe thunderstorms from Wednesday through Saturday night.

Meteorologists are warning of a high risk for a life-threatening and potentially historic flash flood event, stretching from Arkansas to as far as southern Ohio.

ESCAMBIA COUNTY, Fla. -- Streets are flooded as heavy rain pours down in parts of Northwest Florida on Saturday. A Flash Flood Warning is in effect for Escambia County, according to the National Weather Service.