Mark Davies was one of the eyewitnesses, as water cascaded over the wall of a car park after debris blocked a culvert.
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In this today's Newsweek Wales, Carl talks about cancer survival rates in Wales and the search for volunteers to train guide dog puppies.
It'll be brighter today with some lingering blustery showers. This evening it'll be colder under clear skies, with isolated showers.
Gareth Bale put any domestic troubles behind him as he starred in Wales' emphatic 3-0 win over Israel in Haifa.