Firefighters were still rescuing stranded drivers from their vehicles yesterday following the downpour on Wednesday.
Several motorists ended up having to call 999 after trying to drive along flooded roads.
It followed similar incidents throughout the county on Wednesday, when crews were called to seven reports of vehicles stuck in floods.
Incidents yesterday included a man who was rescued by firefighters after becoming marooned in Syston Road, Cossington, while another motorist became stuck in Sileby Lane, Mountsorrel.
Fire service manager Neil Mayne, who specialises in water rescues, said: "Owing to the large amount of rain we are experiencing, we recommend that members of the public carefully plan any journeys.
"Two feet of moving water is enough to move a car or a 4x4 vehicle.
"Do not attempt to drive or walk through water of an unknown depth because you won't know it's too deep until it's too late."
Other incidents on Wednesday included a 999 call to Watergate Lane, in Braunstone, Leicester, where a driver needed treatment for shock after getting stranded at about 12.15pm.
An elderly couple were rescued from their car in Main Street, Whissendine, and the disabled female passenger was given oxygen by firefighters.
Crews were also called to Foston Road, Countesthorpe, to rescue a group of ponies stranded in flood water at 4.15pm.
The River Soar burst its banks to the south of Leicester, flooding Soar Valley Way and Braunstone Lane East.
Large areas of Aylestone Meadows were flooded, including the building site off Braunstone Lane East where a new sports pavilion is under construction. The building, which is on short stilts, was not flooded.
The Brentingby Dam, on the River Wreake, near Melton, was just three metres away from overflowing at the height of the flooding.
The Environment Agency has issued a warning to landowners in the area and police have warned drivers to stay alert and avoid flooded roads.
A spokesman said: "Please drive safely and carefully on the roads of Leicester, Leicestershire and Rutland.
"Do not ignore road closures and do not attempt to cross if the water seems too deep.
"One of the biggest causes of accidents is not necessarily the weather but poor driving. Drive according to the conditions. If a road is flooded, stay in first gear but keep the engine speed high by slipping the clutch – this will stop you from stalling.
"Drive slowly and avoid areas where the water is deepest and test your brakes when you have passed the flooded area before you drive at normal speed."
