A weather station in Catonsville registered nearly 13 inches of rain in just three hours Sunday afternoon. Water levels were close to the second story on Main Street in Ellicott City.

For the second time in two years, Main Street in Ellicott City has been transformed into a raging river as a result of thunderstorms unloading torrential rain. The National Weather Service issued a flash-flood emergency for the city at 4:40 p.m. Sunday and reported water rescues underway.

“This is an EXTREMELY DANGEROUS AND POTENTIALLY CATASTROPHIC situation,” the National Weather Service warned. Sunday’s flooding unfolded in a similar way to the 2016 flash flood in which six inches of rain fell in two hours and two people died.

[Crews rescuing people as torrential floods hit Ellicott City]

Radar suggests that more than eight inches of rain has fallen around Ellicott City and Catonsville. A weather station in Catonsville registered nearly 13 inches of rain in just three hours Sunday afternoon.

The flash-flood emergency in Ellicott City was originally in effect until 7:30 p.m., but was extended to 10:30 p.m. Another emergency warning was issued for locations along the Patapsco River in Anne Arundel, Howard and Baltimore counties around 6 p.m., where gauge reports indicated that a major flash flood was occurring.

Officials are urging that anyone in the area seek higher ground and not to drive on flooded roads.

**PLEASE RETWEET**
If you are in the downtown Ellicott City area or know of family/friends who live there: Please AVOID the downtown area. If you are in a vehicle – DO NOT DRIVE THROUGH FLOOD WATER. Turn Around, Don't Drown.

— Maryland Emergency Management Agency (MDMEMA) (@MDMEMA) May 27, 2018

Just to the south of Ellicott City, radar indicated that as much as seven to eight inches had fallen — which is an incredible amount of rain in such a short time.

Strong thunderstorms have formed and reformed in the zone between Ellicott City and Baltimore, unloading extreme rainfall in a process known as training. Flooding also has been reported in downtown Baltimore and Columbia.

Atmospheric moisture levels — near record-high levels — have fueled the onslaught of storms.

Here are some photos and video. Please note that these videos are unedited and contain foul language.

Picked a hell of a day to visit Ellicott City, MD. This is real.

A post shared by Craig Patrick (@giantsofdiving) on May 27, 2018 at 1:30pm PDT

It’s happening all over again. Main Street in @EllicottCity with devastating flooding. @CairnsKcairns @FOXBaltimore @wbaltv11 @wjz video courtesy my sister Kali Harris. (Explicit language) #EllicottCity #Maryland pic.twitter.com/IuwBRyPRzW

— Jeremy Harris (@JeremyHarrisTV) May 27, 2018

no smarmy comment

A post shared by Sameera Mukhtar (@sameeramukhtar) on May 27, 2018 at 1:54pm PDT

In case it’s not clear yet, stay away from Main Street. Please. pic.twitter.com/FO1HFpYqMo

— Libby Solomon (@libsolomon) May 27, 2018

Main Street #EllicottCity flooding. pic.twitter.com/crYP74go08

— Libby Solomon (@libsolomon) May 27, 2018

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