Towns and villages along a stretch of the River Thames between Windsor and Walton-on-Thames have been deluged after heavy rainfall.
The Environment Agency issued a total of 14 severe flood warnings - signifying danger to life - for the relatively small patch of Surrey and Berkshire and advised people to evacuate.
Helicopter footage following the course of the River Thames shows the extent of the flooding on Monday:
The evacuations started in the village of Wraysbury in east Berkshire where teams of volunteers used whatever floating craft they could find to ferry local residents to safety.
Among the evacuees was Sue O'Brien carrying her three bearded collie puppies to dry ground. She told ITV News the family had grown tired of living on the first floor of their flooded home:
By Tuesday morning, many streets in Wraysbury were underwater leaving just the roofs of cars visible above the deluge.
Officials from the Environment Agency and local emergency services have also helping to move people from their flooded homes.
The evacuations continued into the night with some vulnerable residents having to be carried from their homes.
A local tour boat operator, Windsor Duck Tours, lent a hand by using one of its amphibious vehicles to ferry bus loads of residents to safety.