He's probably talking about more than just Louisiana.
I know. And he is still way off. The whole disaster area is only 90,000 sq miles. Hardly twice the size of Europe's 4,000,000+ sq miles. In fact, there is no way his comment makes sense. He was obviously trying to repeat the comment that the disaster area is roughly 2x the size of the UK. He just goofed...but it ain't even close.