Urban Heat Islands with Dr. Vivek Shandas

Dr. Vivek Shandas, a professor of climate adaptation at PSU, delivered a comprehensive presentation titled "A Toxic Past, Heated Future" examining the Portland Harbor area through the lens of urban heat islands. He begins by establishing the historical context, explaining how 1930s redlining policies in Portland designated certain neighborhoods as "hazardous," which led to disinvestment and created conditions where heavy industry could later locate on cheaper land near the harbor. This created what he describes as "layers of trauma and exclusion" that persist today.

Using mapping technologies and sensor data, Shandas demonstrates that the Portland Harbor consistently registers as one of the city's hottest areas, running 15 degrees warmer than the airport temperature readings on hot days. When the airport reads 95°F, the harbor typically reaches 108-110°F. His thermal mapping campaigns show the harbor remains hot throughout the day - in morning, afternoon, and evening measurements - unlike other areas that cool down at certain times.

Shandas explains that this extreme heat creates multiple dangerous conditions through what he calls "adjacency" - the cumulative effects of what's near the site. Industrial surfaces amplify temperatures and create heat plumes that blow into adjacent neighborhoods. Hot runoff from these surfaces increases water temperatures in the river, affecting fish habitat and creating conditions for algae blooms. The area houses vulnerable populations including unhoused communities who are directly exposed to these conditions. Infrastructure in the harbor experiences accelerated wear and tear from repeated thermal expansion and contraction. Perhaps most concerning, hot air from the harbor creates updrafts that blow onto Forest Park, potentially drying soils and increasing fire risk in an area immediately adjacent to fuel tanks.

The presentation also covers Shandas's creation of a social vulnerability index specific to the harbor area, combining air pollution exposure data with demographic factors. His analysis shows the harbor area has the highest concentration of vulnerable populations in the Portland metro region. He advocates for strategic tree placement along site edges rather than within industrial areas, community-based sensor networks for real-time monitoring, and policies that create "green islands" in industrial zones to provide heat relief and ecological benefits.