Marc Thompson said the "hardest thing is not knowing" where his twin brother Ben is.
The 34-year-old from Haverfordwest has been missing since Saturday, after he watched Wales' Six Nations game at the Millennium Stadium.
He told our Correspondent Carole Green that this would be "very out of character" for him not to contact his family.
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It's not great news on the weather front, with more rain expected and temperatures dropping.
The Eben Haezer barge was a feature next to a pub and restaurant - but is now submerged.
The council said the £75 fine was issued because there is no cardboard recycling facility at that particular site.