The Cumbria 2015 Flood Appeal, which was launched on 5 December, has now doubled its target to £2m.
The fund is being run by the Cumbria Community Foundation which has pledged £50,000.
The foundation said grants would help flood victims with cleaning, emergency repairs, clothing, food and basic furniture.
An online appeal set up to help those affected by flooding in Cumbria has raised £500,000.