emergency means an event (whether occurring in the State, outside the State or in and outside the State) that causes, or threatens to cause—
(a) the death of, or injury or other damage to the health of, any person; or
(b) the destruction of, or damage to, any property; or
(c) a disruption to essential services or to services usually enjoyed by the community; or
(d) harm to the environment, or to flora or fauna;