A maximum 100 millimetres of rain was forecast to fall across the district through today and tomorrow.
A floodwatch warning was issued Friday lunch-time by the Environment Agency for the Upper River Calder at Todmorden and Hebden Bridge.
Staff from the Environment Agency are checking out pumping stations and ensuring water courses are clear from obstructions throughout Yorkshire.
"The Environment Agency's own forecasters are working with Met Office colleagues to ensure that timely flood warnings can be issued, when needed, to give residents and businesses as much opportunity as possible to keep themselves and their property safe from flooding," said a spokeswoman.
Once rivers swelled from the deluge a more accurate assessment of where flooding would occur could be given.
Updates will be given on a Floodliine which is on 0845 988 1188.
Halifax Home Insurance is urging people to take preventative steps to limit the risk of flooding with two weeks' rain expected in 24 hours.
Senior Claims Manager Martyn Foulds, said: "With the cost of storm damage claims often running into thousands, it makes sense for homeowners to take whatever preventative steps they can at this stage to reduce the risk of damage to their homes."
He suggests where homes are at risk householders should place sandbags outside doors, turn off power supplies and store elecrical items as high as possible.
Furniture and sentimental items should also be moved upstairs where possible and pipes to household appliances should be disconnected in case they move during floods.