Police said the woman's body had been found near a stretch of the River Derwent near the town of Darley Dale in Derbyshire.
Dozens of people were trapped in a shopping center in the city of Sheffield overnight after becoming stranded by rising waters and about 100 others were rescued from a nearby mall by firefighters in dinghies.
The greatest concern was for homes in six areas around the River Don near the town of Doncaster where water levels reached dangerous record highs.
Residents were initially warned to immediately evacuate although the local authority later advised them to instead remain vigilant.
There were more than 150 alerts in other areas of the country where the Environment Agency cautioned that flooding was either expected or possible.