Bowlish Infant School near Shepton Mallet has been evacuated because of flooding.
The children have been moved up the hill to the Bowlish House Hotel where their parents were coming to collect them.
Structural engineers are being brought in to check the integrity of the walls, as water is lapping at the doors.
It appears there is unlikely to be any let up in the relentless rain showers that have battered the Westcountry over the past few days.
Communities in Devon hit by floods over the weekend have been praised by Devon County Council. Many residents are still clearing up.
Dozens of people are clearing up after heavy rain burst rivers and flooded homes. Devon and Dorset hardest hit.