"We will continue to monitor the situation and aim to have the children out by this evening if possible."
The council was also using helicopters to access the scale of the damage and flooding around the district.
The Hakarimata walking track at Ngaruawahia has also been closed until further notice.
Old Mountain Road, Raglan, is the latest of 10 road closures around the area so far today.
Others include, Waingaro Road and Te Puroa Road, Ngaruawahia; Slater Road, Rotowaro Road and Hangapipi Road, Huntly; Highway 22 north of Glen Murray at the 21.5km mark;
Waitetuna Valley Road, Te Uku; Tuakau Bridge and Port Waikato Road, Klondyke Road, Allen and Eyre Road all in Tuakau.
The council said it is still investigating reports of surface flooding and slips.