San Francisco Climate Projections

How will climate change impact San Francisco weather patterns? This section summarizes climate projections for temperature, sea-level rise, extreme storms, and drought over the next century.

The image is a chart with three columns. The first column is labeled 'hazard. The second column is labeled 'Climate Impact', and the third column is labeled 'health impact'. The first Hazard is 'Temperature. The Climate Impact for 'Temperature' is 'yearly average temperature to increase between 4.1 and 6.2 degrees by 2100', 'extreme heat days (over 85 degrees) to increase by 15-40 by 2050, potentially 90 by 2100', and the last climate impact of temperature is that it will increase heat wave length and frequency. The health impacts of the climate impacts of temperature include dehydration, heat stroke, heart disease, respiratory illness, asthma, allergies, and mental and behavioral health'. The second hazard is sea-level rise. Its climate impact is that, in the most likely scenario, sea levels will rise between 7-15 inches by 2050, and 26-44 inches by 2100. The health impacts are fatal and nonfatal injuries, waterborne disease, mental and behavioral stressors, and income loss. The third hazard is extreme storms. The climate impact is that precipitation levels are projected to fluctuate between wet and dry extremes. Currently California receives 35% to 45% of its annual precipitation from 'Pineapple Express' extreme storm events. This number could increase by up to 11% by 2100. The health impacts of extreme storms include fatal and nonfatal injuries, waterborne disease, mental and behavioral stresses, strains on public infrastructure, and income loss. The last hazard is drought. The climate impact is that because of precipitation level fluctuation, severity of droughts will increase. The health impacts of drought include Income Loss, Food Insecurity and Malnutrition, Respiratory Illness, Asthma, Allergies, and Mental and Behavioral Health.

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