Matt, if you're referring to the floods which hit the area in early April, there's nothing to worry about. You'll be in Fiji in the middle of the dry season (you lucky thing, can I come too?).
The April event was pretty severe, but Fijians are used to getting bad weather in the wwet season and are well practised at getting things cleaned up and back to normal quickly. Hopefully all those families affected this time have been able to make a full recovery.
Here's our safety guide for Fiji. http://journals.worldnomads.com/safetyhub/country/72/Fiji
Phil from the safety hub. about 6 years ago