addressing climate change adaptation in regional transportation plans

Addressing Climate Change Adaptation in Regional Transportation PlansA Guide for California MPOs and RTPAsTable 5.1Potential Impacts by Climate Region by CountyClimate Region County Potential Climate ImpactsNorth Coast Del Norte, Humboldt, Lake, and Mendocino Sea-level rise Threats to sensitive species Reduced agricultural productivityNorth Lassen, Modoc, Shasta, Siskiyou, and Trinity Increased wildfire Reduced snowpack Ecosystem shiftsBay AreaNorthern CentralValleyBay-DeltaRegionSouthern CentralValleyAlameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, SantaClara, Solano, and SonomaButte, Colusa, Glenn, Madera, Merced, Sacramento, San Joaquin,Stanislaus, Sutter, Tehama, Yolo, and YubaCoastal inundation and erosionPublic health – heat and air pollutionReduced agricultural productivityReduced agricultural productivityIncreased wildfirePublic health – heatContra Costa, Sacramento, San Joaquin, Solano, and Yolo Flooding Reduced agricultural productivity Public health – heat and air pollutionFresno, Kern, Kings, and Tulare Reduced agricultural productivity Public health – heat Reduced water supplyCentral Coast Monterey, San Benito, San Luis Obispo, Santa Barbara, and Santa Cruz Reduced agricultural productivity Coastal flooding Biodiversity threatsNorth SierraAmador, Calavera, El Dorado, Mariposa, Nevada, Placer, Plumas, Sierra,and TuolumneEconomic impacts – tourism declineEcosystem changeIncreased wildfireSoutheast Sierra Alpine, Inyo, and Mono Economic impacts – tourism decline Substantially reduced snowpack FloodingSouth Coast Los Angeles, Orange, San Diego, and Ventura Sea-level rise Reduced water supply Public health – heat and air pollutionDesert Imperial, Riverside, and San Bernardino Water supply Public health and social vulnerability Biodiversity threatsSource: APG Understanding Regional Characteristics, July 2012.Note: The Central Valley was split into north and south based on hydrologic boundaries; this results in the Northern Central Valley regioncontaining all counties draining to the Sacramento-San Joaquin Delta. The Sierra Nevada area was split based on ecosystemdifferences, as well as variation in projected climate impacts. The Bay-Delta is the only region that shares all its counties with otherregions. The designation of the Bay-Delta as a region recognizes that this area is distinct due to its elevation profile and floodvulnerability.5-2 Cambridge Systematics, Inc.