Tier 1 High Hazard Zones (HHZ)

<p style='background-color:rgb(255, 255, 255); color:rgb(76, 76, 76); font-family:&quot;Segoe UI&quot;, Arial, sans-serif; font-size:13.3333px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin:0px 0px 6px; padding-bottom:1em; text-align:left; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'><span>This layer, in combination with Tier 2 High Hazard Zones, was used to generate the final Combined High Hazard Zones dataset. Tier 1 High Hazard Zones were last updated in 2020.</span></p><p style='background-color:rgb(255, 255, 255); color:rgb(76, 76, 76); font-family:&quot;Segoe UI&quot;, Arial, sans-serif; font-size:13.3333px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin:0px 0px 6px; padding-bottom:1em; text-align:left; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'><span>Tier 1 High Hazard Zones are where tree mortality directly coincides with critical infrastructure. They pose a threat to life and property. CAL FIRE mapped Tier 1 High Hazard Zones by identifying assets to be protected as: communities, powerlines, roads, communication structures, and recreation facilities as well as miscellaneous other critical infrastructure. These assets to be protected were then buffered; communities were buffered by 1,000 feet and all other assets were buffered by 200 feet. Tree Mortality data was provided by the USDA Forest Service Forest Health Protection staff Aerial Detection Surveys from 2012-2015. Field review and revision was needed to refine and finalize HHZ areas. These zones were periodically updated to reflect new mortality or infrastructure assets at risk.</span></p><p style='background-color:rgb(255, 255, 255); color:rgb(76, 76, 76); font-family:&quot;Segoe UI&quot;, Arial, sans-serif; font-size:13.3333px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin:0px 0px 6px; padding-bottom:1em; text-align:left; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'><span>-------</span></p><p style='background-color:rgb(255, 255, 255); color:rgb(76, 76, 76); font-family:&quot;Segoe UI&quot;, Arial, sans-serif; font-size:13.3333px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin:0px 0px 6px; padding-bottom:1em; text-align:left; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'><span>Emergency Declaration: On October 30, 2015 Governor Brown issued an emergency declaration requiring public agencies to identify areas of tree mortality that hold the greatest potential to result in wildfire and/or falling trees and threaten people and property in these areas. Once identified, these areas will be prioritized for removal of dead and dying trees that present a threat to public safety. </span><a style='color:rgb(90, 147, 89); font-weight:normal;' target='_blank' href='https://www.caloes.ca.gov/wp-content/uploads/Legal-Affairs/Documents/Proclamations/20151030-Tree_Mortality_State_of_Emergency.pdf' rel='nofollow ugc noopener noreferrer'><span><u>https://www.caloes.ca.gov/wp-content/uploads/Legal-Affairs/Documents/Proclamations/20151030-Tree_Mortality_State_of_Emergency.pdf</u></span></a></p>