Arwel Jones, Director of Public Services at the National Library of Wales, told ITV News "our concern now is for the collection", and that it will take time for the extent of any damage to be estimated.
More top news
The Welsh Conservatives are calling for the Visit Wales tourism organisation to be scrapped, describing it as 'risk averse'.
A Chief Medical Officer is urging young people in Wales to have a new meningitis vaccine that's being introduced today.
Lots of cloud around this morning with the chance of showers in places, but an improving picture this afternoon.