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ST. LOUIS (KTVI) – Saturday’s torrential rains sent the area’s streams and creeks roaring out of their banks. Two to a much as six inches of rain fell over St. Louis on Saturday. Flooding will continue to be an issue as more heavy rainfall drenches the region Sunday night and Monday.

Water rescue crews with the Monarch Fire Protection District had to retrieve a man from a tree late Saturday night after the man was forced to take refuge from floodwaters.

One of the areas with the most significant problems Saturday was in Brentwood, MO along Manchester Road. West County EMS & Fire reported that they were helping Brentwood fire crews rescue people from floodwaters, pulling people from cars and businesses along the busy stretch of road.

Deer Creek near Tilles Park flooded out of its banks at the Rock Hill/Ladue line, as seen in phone video sent in by Fox 2 meteorologist Angela Hutti.

A spokesman for the Metropolitan Sewer District  said the agency was prepared to handle the heavy downpours.

Meanwhile, the American Red Cross has opened a shelter for Jefferson County residents displaced by flooding, located at the First Baptist Church in Arnold, 2012 Missouri State Road.

In Murphy, Missouri, Saline Creek has left its bed and flooded Old Sugar Creek Road.

Similar scenes of street flooding could be found further down along Highway 30 in High Ridge, Missouri.

Major flooding is now forecast in St. Louis along the Mississippi River and all points south. The forecasted crest on the Mississippi River is up to 41 feet, with a high crest of 45.9 feet at Chester. In St. Louis, that’ll be the sixth highest on record. For Chester, the second-highest flood on record.

Of greater concern is the entire Meramec River basin, which includes the Meramec, Bourbouse, and Big rivers. Major flooding is forecast along the Meramec from Pacific through Arnold. In Valley Park, the crest of 34.2 feet would be the sixth highest on record. There is some concern that rainfall into the Meramec basin may be heavier than forecast and could result in crests closer to record levels.

Crests along the Missouri River are expected to be in the moderate range, or about five to eight feet above flood stage.