Because fusion centers are developed to support operations during an emergency that is either human-made, such as a terrorist event, or natural, such as a hurricane, flood, or tornado, their scope is considered to be:

It is considered to be all-hazard.
Fusion centers are all-hazard in scope, such that they are developed to support operations during an emergency that is either human made, such as terrorist event, or natural, such as hurricane, flood, or tornado. They are clearing houses for all potentially relevant to homeland security information. They also act as centralized host for intelligence but they also allow for efficient communications and operations between agencies and jurisdictions. 

That would be a working theory.