Around 40 schoolchildren are awaiting rescue after their bus slid off a road near Crymych in Pembrokeshire.
The pupils, from Ysgol y Preseli, were on their way home after their school closed early due to bad weather.
It happened between Maenclochog and Mynachlogddu. There are no reported injuries.
A spokesperson for Pembrokeshire County Council said: "The pupils are staying onboard while waiting for a relief bus to collect them and continue their journey."
On Monday, 16 children and three adults had a lucky escape when a schoolbus slid off the road and became trapped on an embankment in the village of Llanfach, near Abercarn.
More top news
The UK government's plans for the Great Repeal Bill cause an argument over whether EU powers will go to Westminster or Cardiff Bay.
FIFA has opened proceedings against Neil Taylor following the Wales defender's challenge on Republic of Ireland defender Seamus Coleman,
A nesting platform and perching post has been installed at WWT Llanelli Wetland Centre in the hopes of attracting ospreys to the Bury Inlet.