About 150 children are stranded at a school camp at Port Waikato School.
Waikato Regional Council this afternoon said all roads in and out of Port Waikato are blocked.
"We understand there are about 150 children on camp at Port Waikato School.
"While all roads in and out of Port Waikato are currently blocked, we understand where the children are located is safe and they are at no immediate risk.