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2021 Multijurisdictional Local Hazard Mitigation Plan middle of this century. A 100-year coastal food, on top of this level of sea-level rise, would almost double the costs. The assessment’s 2019 San Francisco Bay Area Report outlines the following climate change impact concerns for San Mateo County and its surrounding region:  Even with substantial global efforts to reduce greenhouse gas emissions, the Bay Area will likely see a significant temperature increase by mid-century  Precipitation in the Bay Area will continue to exhibit high year-to-year variability with very wet and very dry years. The Bay Area’s largest winter storms will likely become more intense, and potentially more damaging, in the coming decades.  Future increases in temperature, regardless of whether total precipitation goes up or down, will likely cause longer and deeper California droughts, posing major problems for water supplies, natural ecosystems, and agriculture.  Even with high levels of emissions reductions, research suggests that at least 6 feet of sea level rise is inevitable over the next several centuries due to the lag of sea level rise in response to increasing global temperatures.  Bay Area public health is threatened by a number of climate-related changes, including more extreme heat events, increased air pollution from ozone formation and wildfires, longer and more frequent droughts, and flooding from sea level rise and high-intensity rain events.  High levels of socioeconomic inequity in the Bay Area create large differences in the ability of individuals to prepare for and recover from heat waves, foods, and wildfires. Financial resources as well as improved social structures are important to enhance community resilience and reduce these disparities.  Heat waves pose increased health risks due to urban heat islands and lack of local experience and cooling infrastructure (air conditioning) in bayside cities. These risks are compounded for low-income communities.  The future climate of the Bay Area will become less suitable for evergreen forests—redwoods and Douglas fir—and more favorable for heat-adapted vegetation such as chaparral shrub land.  The most threatening effect of climate change to Bay Area wildlife is the impact of rising sea levels on wetlands because of the limited potential for wetlands to move inland and become established. At the same time, less rainfall, more summer heat, and increased drought will hurt amphibians and reptiles, while heat and wildfires may negatively affect upland birds, mammals, amphibians, and reptiles.  Future land use decisions will significantly influence the Bay Area’s efforts to address climate change, affecting building and transportation energy, urban water demand, and wildfire ignitions. For example, the critical lack of affordable housing in the core of the region is forcing households further south, north, and inland, with negative consequences on energy and the environment. Cal-Adapt, a publicly available resource that offers information on how climate change might affect local communities, provides visualization tools that present the most current data available whenever possible. The Local Climate Change Snapshot tool allows the Cal-Adapt data to be customized by location. The output report includes data reflecting modeled historical data, observed data, medium emissions data (RCP 4.5), and high emissions data (RCP 8.5). Climate change projections present valuable information to help guide decision-making for possible future conditions. The following sections summarize information presented by Cal-Adapt for San Mateo’s local climate snapshot. 17-6