Over 4,000 flash flood warnings are issued across the United States every year, but only a fraction are declared emergencies.

Just a small percentage of flood alerts issued by the National Weather Service each year are the highest level called a flash ...

Jason Davis/Getty Images As of Saturday evening, Memphis, Tennessee, remained under a flash flood emergency as the latest round of torrential rain continued to sweep east across parts of the mid ...

In Memphis, Tennessee, rain falling at rates of over 5 inches an hour quickly overwhelmed streets and neighborhoods on Saturday afternoon, leading to a Flash Flood Emergency. Water rescues were ...

Flash flood emergency and tornado warnings continued to be issued Saturday across Arkansas, Mississippi, Tennessee and Kentucky, with more heavy rains and damaging winds in the mix. Hundreds of ...

Quarter-sized hail and tornados are also possible. Flash flood emergency issued for Memphis, Shelby County The National Weather Service in Memphis issued a flash flood emergency for Memphis ...

Flash flood emergency warnings are rare: Given the large number of flash flood warnings issued, just over 20 years ago the NWS begun issuing a more extreme alert, called a flash flood emergency ...