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Wildland Urban Interface
- Where are the wildland urban interface (WUI) areas?
- Currently, the WUI areas consist of any area which cannot
demonstrate adequate fire flow and any area outside a fire
district.
- What is fire flow?
- The flow rate of a water supply, measured at 20 psi residual
pressure that is used for fire fighting. The criterion of 20 psi
residual pressure is used because that is the minimum pressure
recommended for fire engines and provides a consistent point
from which to measure the available flow.
- What is the main objective of WUI?
- The WUI mitigates damage and risk to life and property and
reduces the risk of forest fires due to structure fires in
hazard areas (and vice versa). Fuel reduction at the interface
between natural lands and developments can reduce the intensity
of the fires before they enter populated areas within the
wild-land urban interface.
Research has shown that the most important factors influencing
building survival during a wildfire are fire intensity,
vegetation characteristics, building materials, and maintaining
a defensible space. Strategies for protecting homes from
wildfires have been developed with these factors in mind.
WUI permit application and submittal
requirements
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