I would say if it did not involve Nuke then I would say Unusual event. see below, Levels of Emergency
The Notification of Unusual Event (NOUE) is the lowest NRC emergency action level and requires that the utility notify the Nuclear Regulatory Commission (NRC) and the state emergency agency. The NUE indicates there is a degradation of safety systems, although not serious enough to warrant special activation of the utility emergency organization.
If we remember that nuclear plants are designed with 3 barriers - fuel clad, reactor cooling system piping and vessel, and the containment - between the radioactive materials in the fuel and the public, the remaining emergency classes are generally based on successive breach of those boundaries.
The alert generally indicates that one boundary has been potentially seriously degraded;
the site area emergency generally indicates two boundaries have been potentially seriously degraded;
the general emergency indicates all three barriers have been seriously degraded and that radioactive releases are occurring