Steady rain looks likely to continue into the night after downpours across Greater Manchester on Saturday.
The North West Motorway Police warned motorists to “slow down” in the wet weather as they worked to deal with a number of road traffic collisions.
Officers tweeted: “We are currently dealing with numerous RTC's where vehicles have lost control in the wet.
“The easiest way to avoid this happening to you, is to slow down!”
In Monsall, in east Manchester, there was flooding on the road beneath the bridge on Queens Road, close to Oldham Road.
Some cars were forced to turn around to avoid the flooded area.
The rain fell for much of the day in Manchester, including in the city centre.
Those who ventured into town a day after Tier 3 restrictions were imposed across the region wore raincoats and donned umbrellas to shield themselves from persistent showers.
Heavy rain is expected to last across the region for most of the night.
According to The Met Office it will be a “wet and blustery night, possibly thundery at times”.
Forecasters say there will be “Blustery showers, often heavy and at times possibly thundery, affecting all parts of the region throughout the night”.
The Met Office website states that it will be “Less showery later in the night with possibly the odd clear spell at times in the early morning hours. Minimum temperature 2 °C.”
Sunday is expected to produce sunny spells and scattered showers across the region.
