Cornwall Fire and Rescue Service were called to homes in Delabole, near Camelford, after flooding was caused by a burst water main.
Crews from Delabole arrived at the four houses on Atlantic Road at around 1.30am Saturday morning.
Pumps were used to remove water in to a nearby field, and crew members helped the home owners to salvage and move their belongings.
South West Water attended the scene and isolated the mains water.
No casualties have been reported.