Report Outlines Likely Climate Change Impact on Puget Sound Region

Monday, November 23, 2015

new report by the University of Washington projects dramatic changes in the Puget Sound region due to climate change; an entire chapter is devoted to the potential effect on human health.

Tania Busch Isaksen

The region faces rising seas, heavier downpours, more frequent floods and landslides, less snow, and hotter, drier summer streams, according to the report, “State of Knowledge, Climate Change in Puget Sound.” That could lead to more direct and indirect impacts on human health, according to co-author Tania Busch Isaksen, a lecturer in the Department of Environmental and Occupational Health Sciences within the School of Public Health.

“Climate change affects us even here in the relatively temperate climate of Puget Sound,” Busch Isaksen said. “It directly increases the risk of negative health effects through changes in the frequency, duration and severity of extreme weather events, but it also indirectly affects us through changes to our natural systems important to health, such as our water supplies, wildfire risk, and the ways in which diseases are spread.”

Populations at greatest risks, she said, are often the aging and elderly, children, those with existing chronic health conditions, individuals with greater exposure to outside conditions, and those with limited access to health resources.

The report synthesizes research from published papers, agency studies and regional adaptation efforts, and is the first major update on climate change impact on the region since 2005.

Busch Isaksen and colleagues say that climate change is expected to exacerbate public health challenges and in some cases lead to new risks and diseases. The authors note:

  • Health is harmed directly by more intense and frequent extreme heat, leading to increased hospitalizations and mortality.
  • Increased fire risk could affect human health through smoke exposure and increased occupational hazards for firefighters.
  • Rains could become more intense, leading to more flooding and associated health risks.
  • Lower water levels during drier summer seasons could lead to higher concentrations of chemicals or bacteria in drinking water sources.
  • Changes to our natural systems may alter patterns of infectious disease.
  • Negative mental health effects may increase as climate change impacts intensify.

The report cites Busch Isaksen’s previous research, which found a strong link between heat stress and health outcomes in the Seattle area. The report also looks at how communities are beginning to respond.

The report was published by the Climate Impacts Group in the university’s College of Environment.