Fuel Modification Zone A wide strip of land where combustible vegetation has been removed and/or modified and partially or totally replaced with drought-tolerant, fire-resistant plants to provide an acceptable level of risk from wildland and vegetation fires. Hazard Reduction Zone Sub-area of the Special Fire Protection Area containing structures built prior to July 1, 1999 and not designate as a Fuel Modification Zone. Very High Fire Hazard Severity Zone Any geographic area designated pursuant to Government Code Section 51178 to contain the type and condition of vegetation, topography, weather, and structure density due to increased possibility of conflagration fires.