Glasgow may have borne the brunt of flooding, early-week downpours that have doused much of Scotland and northern Ireland.
Parts of the city's underground were closed as flooding hit roads and property, the BBC News said on Tuesday.
In light of road closures, motorists were warned of long delays.
In Greenock, a number of people were reported to be stranded in a hotel, where 3 feet of water flooded the first flow.
Flooding in central Scotland closed "many roads" and caused some trains not to run. Rescue of people stuck in cars was being undertaken by Central Scotland Fire and Rescue, the BBC said. Control room staff called conditions "absolutely horrendous."
Some of the highest observed rainfall targeted the populous center of Scotland, weather data accessed by AccuWeather.com showed at least 66 mm (2.6 inches) of rain at the Glasgow airport. Most of the rain fell within 24 hours.
The storm that dumped the rain also unleashed troublesome high winds. Bridge closures and restrictions were reported, as were instances of minor damage such as fallen trees, according to the BBC.
The Memorial Day weekend will begin cool, windy and rainy in New England and part of the mid-Atlantic.
On the two-year anniversary of the EF-5 tornado that leveled Joplin, Mo., the town has deployed assistance to Moore, Okla.
The tornado tore through a path 17 miles long on Monday and had wind speeds as high as 200 mph.
Wednesday will be drier and less humid for recovery and clean up efforts.
The same storm system responsible for producing violent thunderstorms in Oklahoma recently will reach the Atlantic Seaboard Thursday.
Strong thunderstorms impacted areas from Texas and Louisiana to New England with large hail and damaging winds.
Atlantic City, NJ (1991)
Record high of 89 degrees after a record low of 38 degrees. Record lows were also set May 19,20, & 21st.
Waterville, ME (1832)
Kennebec Flood discharged 140,000 cubic feet of water per second -- high stage not equalled until 1901, and not exceeded until 1936.
Southwestern & Central OK (1996)
Sinking air from dying thunderstorms cause unusual late night rise in temperature. Many places rose from upper 80s at 11:00PM to near 100 degrees by 3:00AM.