It may very well boost it. Thanks to Bob Murphy for reminding me about a link I had already shared on facebook (although not here).
People will twist this into something completely different, but the analysis is quite sound.
GDP is important but it's not everything. Acknowledging the straightforward point that it could very wel boost GDP is by no means the same as saying that hurricanes are good things. They aren't. Don't let people twist the claim into something about general economic well-being.