The 2021 No-HARM Mapping Tool prepared for the City of Calistoga evaluates wildfire risk in the entire area served by the Calistoga Fire Department. 

The model’s core is the evaluation of the built environment. Factors such as parcel density, road system complexity and distance to fire stations are incorporated into the final hazard ratings. In addition, it incorporates high wind areas, and interface zone adjustments, and evaluates areas that are susceptible to embers, smoke and evacuation in combination with flame encroachment exposure. 

 In addition, the web interface  incorporates Zonehaven, which enables Calistoga to coordinate wildfire evacuation plans with other Napa County agencies.  Zonehaven will also allow more fluid coordination with Napa County agencies such as the Napa County Sheriff’s Department, Cal Fire and Napa County Office of Emergency Services. Zonehaven has been adopted by neighboring Sonoma County as well. This will allow for regional coordination when evacuation is necessary for multi-county natural disasters, including wildfires.

Zonehaven works by breaking the entire City of Calistoga into “Zones”. Each zone has a corresponding number on the map.  A resident need only to know their Zone identification number to know if they need to evacuate and when it is safe to repopulate.  During an emergency the Zone number will be provided along with clear evacuation instructions. Zonehaven will provide traffic in real-time, identify where possible evacuation centers will be located and use the latest wildfire information provided by incident commanders on the scene as any wild fire event unfolds.

"Know Your Zone" Be prepared and look up your Zone by visiting ZoneHaven here.