Essex County Council has said the John Ray Infant School in Braintree will not be open next week after it was destroyed by fire.
Councillors have met to decide on temporary accommodation for the school as soon possible. However, the school will not be able to open on Tuesday September 3 as planned.
Cllr Ray Gooding, Cabinet Member for Education and Lifelong Learning, said: "I am very sad for the community as this very fine school has lost its building.
"The school has excellent leadership and I have every confidence that once we can arrange temporary accommodation they will continue to provide very good education.
"I am also immediately looking into plans for a properly rebuilt school and will be working with the school leadership on this."
More top news
Luton's interim boss delighted with 4-0 win over Peterborough while Cambridge edge five goal thriller against Northampton.
Cold with increasing amounts of cloud overnight and an early frost. Low temperatures of -5 deg C (23 deg F).
The Queen has been to a Sunday morning service in Wolferton near Sandringham, but the Duke of Edinburgh was not with her.