The Environment Agency has said the areas most likely to be hit by severe flooding include Derbyshire, Lancashire, South and West Yorkshire, Staffordshire, Greater Manchester, Blackburn, Blackpool, Warrington, Cheshire and Halton.
There are currently three flood warnings for potential river flooding and 89 less serious flood alerts, but the Environment Agency said many more were likely to be issued today in the face of the torrential rain.
The agency also warned of surface water flooding when drains become overwhelmed by too much rain. The public has been warned to take care near floodwater and not to take risks walking or driving through floods.
Forecasters said large parts of northern England had already received 15-20 mm (0.6-0.8 inches) of rain, with some areas seeing as much as an inch of rainfall this morning.
A Staffordshire Bull Terrier cross puppy, with a skin condition, is looking for a new home after being abandoned in last weeks downpours.
Butterfly populations could suffer population crashes as a result of the record-breaking wet weather, Sir David Attenborough warned today.
The long-awaited reunion of Kylie Minogue and Jason Donovan has been cancelled after Hyde Park in London became waterlogged.