2.15pm. The Environment Agency has issued a flood alert for parts of the area.
The agency has issued the alert for Horbling, Folkingham, Billinborough and Bourne, after about 15mm of rainfall fell over Lincolnshire in the night.
It said a further 20 to 30mm of rain was expected to fall during the rest of today (Thursday) and that river levels were expected to continue rising.
There is no flood warning for the River Welland in Stamford at the moment.
But there is a flood warning in place for tributaries of the River Welland, which could affect Caldecott, Oakham and Ketton.
Drivers are being urged to take care on roads affected by flooding.
Police said the A15 at Northorpe, near the former Mears Motors garage, is flooded but passable. It was first called in at 8.15am this morning (Thursday) but the water is continuing to rise.
A Ford car went into a ditch on the A15 Bourne Road, near Folkingham, at 8am this morning. The woman driver was not injured.
At 12.25pm, a car got stuck in 3ft of water in Elsthorpe Road, Stainfield, near Morton, and the road is blocked.
There have also been reports of flooding on Stamford Road between Oakham and Barnsdale.
There is standing standing water on roads throughout Rutland but all major routes remain passable.
Leicestershire Fire and Rescue Service, which covers Rutland, is warning drivers not to put themselves and the lives of others at risk by driving through flood water.