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<br /> <br />Wildfire <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />Note: from 2016 on, data for San Mateo County is combined with data for Santa Cruz County. <br /> Figure 16-1. CAL FIRE Wildfire Activity Statistics for San Mateo County <br /> <br />Figure 16-2 shows the Fire History for fires larger than 10 acres within Santa Cruz and San Mateo County <br />identified in the 2018 Santa Cruz/San Mateo County Community Wildfire Protection Plan. <br /> <br />16.2.3 Location <br />Figure 16-3 shows the very high FHSZ and other severity zones for LRA and SRA for San Mateo County. These <br />maps are the basis for this wildfire risk assessment. City-level very high FHSZ maps are also available on CAL <br />FIRE’s website for Belmont, Half Moon Bay, Hillsborough, Portola Valley, Redwood City, San Carlos, San <br />Mateo, and Woodside. <br /> <br />The geography, weather patterns, and vegetation in the Bay Area provide ideal conditions for recurring <br />wildfires. Especially vulnerable are the SRA between Shelter Cove, Moss Beach, Half Moon Bay, Sky Londa, <br />and Crystal Springs Lake. The southern half of the County is mostly rated as moderate or high, with some very <br />high sections, including in La Honda. LRA rated as very high include land immediately west of Crystal Springs <br />Lake, land near Woodside and Sky Londa, and land about halfway between Half Moon Bay and Moss Beach. <br />Very high LRA are adjacent to very high-risk SRA. <br /> <br />16.2.4 Frequency <br />Based on risk factors for the County and past occurrences, it is highly likely that wildfires will continue to occur <br />in San Mateo County. Wildfires are influenced by both weather and human activities. Based on its history of past <br />events, San Mateo County has a high chance of a wildfire in any given year. The most common causes of <br />wildfires, based on the most recent past events, will be “undetermined,” equipment use, miscellaneous, and power <br />line/electric power. <br /> <br /> <br />16-5 <br />45 <br />40 <br />35 <br />30 <br />25 <br />20 <br />15 <br />10 <br />5 <br />0 <br />2000-04 2005-09 2010-13 2014-17 2017-19 <br />Reported Cause Number of Fires