Vulnerable Populations
Two dimensions of vulnerability Understanding who is disproportionately affected requires examining both: Biological vulnerability: Who is more susceptible to harm from pollution: Physiology. Age. Pre-existing disease. Exposure disparity: Who faces greater exposure due to social and environmental factors: Where you live and work. Socioeconomic status. Environmental injustice occurs when these dimensions intersect—where vulnerable populations bear […]
Multilevel Interventions and Co-Benefits
From understanding to action Actions that simultaneously address climate change and create multiple health benefits beyond improved air quality. Climate action is health action. The most effective interventions create benefits across multiple domains: Air quality. Climate. Health. Equity. Economy. Policy-level interventions: Emission reduction strategies Transportation sector transformation Electric vehicle transitions Mechanism: Elimination of tailpipe emissions […]
Health Consequences
From exposure to disease Air pollutants enter the body through inhalation, triggering an inflammatory response cascade that affects multiple organ systems. Understanding these pathways— from molecular mechanisms to population health patterns—is essential for clinical practice. Particle size determines where pollution goes in your body PM10 (≤10 μm): Deposits in upper airways (nose, throat, large bronchi); […]
Sources of Air Quality Degradation
Transportation sector The transportation sector is the largest contributor to urban air pollution in most developed countries, mainly due to vehicle emissions. Primary pollutants produced Nitrogen oxides (NOx): Formed during high-temperature combustion, NOx contributes to ozone formation and respiratory irritation. Volatile organic compounds (VOCs): React with NOx in sunlight to form ozone; some VOCs are […]
Introduction to Degraded Air Quality
Patient: Marcus Marcus is a 6-year-old male, who is accompanied by his mother. He presents with a worsening cough, wheezing, and shortness of breath. He has a history of asthma that was previously well controlled on his inhaler therapy. You recall that the AQI is 145. What do you do for Marcus? Please think about […]
Degraded Air Quality
This module explores how climate change and pollution degrade air quality and the resulting health consequences, with attention to populations at greatest risk and strategies at multiple levels that create co-benefits for both climate and health. Sections Note Environmental and health policies evolve with changing political administrations. While federal approaches may shift, the scientific evidence […]
Climate Change and Heat Impacts Resources
Vulnerable populations summary Population Physiologic mechanism Social/Structural factor Clinical action Older adults (≥65) ↓ cardiac reserve ↓ sweating ↓ thirst perception Social isolation Fixed income Medication review Cooling plan Daily check-ins Chronic disease Varies by condition (e.g., CHF: ↓ cardiac output) Healthcare access barriers Medication costs Disease-specific counseling on heat impacts Low-income communities Often compounded […]
The 2021 Pacific Northwest Heat Dome
In late June 2021, the Pacific Northwest experienced an unprecedented extreme heat event. A strong high-pressure “heat dome” parked over the region around June 25–30, 2021, leading to record-shattering temperatures: Lytton, BC: 121°F (49.6°C), the highest temperature ever recorded in Canada. Seattle, WA: 108°F (42.2°C), in a city where June highs are usually in the […]
Case Study: Heat Wave Preparedness
alert A heat wave is forecasted for Washington state (expected temperatures 100–105°F for five consecutive days). Your clinic has asked you to help prioritize which patients should receive proactive outreach calls with heat safety counseling before the heat wave arrives. You have limited time and can only reach three of the following five patients today. […]
Protecting Health During Extreme Heat
Both public health measures at the community level and clinical interventions at the patient level are essential for preventing heat-related illness and deaths. Public health and community response Heat alerts and early warnings Meteorologists can often predict heat waves 3–7 days in advance. Public health agencies issue excessive heat warnings with clear messaging about severity. […]