Critical action. Any activity for which even a slight chance of flooding would be hazardous as determined by the Agency. Critical actions include activities that create, maintain, or extend the useful life of structures or facilities that produce, use, or store highly volatile, flammable, explosive, toxic, or water-reactive materials; maintain irreplaceable records; or provide essential utility or emergency services (such as data storage centers, electric generating facilities, water treatment facilities, wastewater treatment facilities, large pump stations, emergency operations centers including fire and police stations, and roadways providing sole egress from flood-prone areas); or facilities that are likely to contain occupants who may not be sufficiently mobile to avoid death or serious injury in a flood.
7 CFR § 1970.6
Definitions. Terms used in this part are defined in 40 CFR part 1508, 36 CFR 800.16, and this section. If a term is defined in this section and in one or both of the other referenced regulations, such term will have the meaning as defined in this subpart.