It tends to release a lot of insurance money into the economy and a lot of work restoring things. Not good for inflation. A bunch of the mid/large (for NZ) tech sector companies tend to be a bit divorced from the NZ economy as many target a global audience, biggest factors tend to be the exchange rate/cost of living.

Boom times for anyone in road building and construction, probably. It's been described as a billion dollar weather event on par with the Christchurch earthquake 10+ years ago.