Urban heat islands leave some neighborhoods dangerously hotter than others
#00003
Dense, low-canopy, dark-surfaced neighborhoods run several degrees hotter than nearby areas during heatwaves, concentrating health risk and energy costs — and the burden falls hardest on low-income districts least able to adapt.
#00063Ceramic evaporative cooling modules for hot-dry public spaces
Porous fired-terracotta modules, kept wet by solar-powered pumps and fans, cool passing air by evaporation — creating comfort pockets at bus stops, plazas and courtyards with no refrigerants and minimal energy. Effect is large in hot, dry air but collapses in humidity, and every
#00006Expand and target urban tree canopy on the hottest, lowest-canopy streets
Plant and steward trees, prioritizing the specific streets that heat-mapping shows are hottest and have least canopy. Trees cut surface and air temperature through shade and evapotranspiration, and also reduce stormwater runoff.
#00008Passive-cooling urban design plus formal heat governance
Reintroduce passive cooling from traditional hot-climate design — shaded streets, courtyards, underground air channels — and pair it with heat governance: naming and categorizing heatwaves so the public treats heat as seriously as storms.
#00007Convert dark roofs and pavement to reflective, high-albedo surfaces
Replace dark, heat-absorbing roofs and pavement with high-albedo reflective surfaces — cool roofs, light-colored or coated pavement — to reflect sunlight rather than retain it. Acts fast and scales through building codes and repaving cycles.
#00062Centralized district cooling to replace per-building air conditioning
A central plant chills water and pipes it underground to many buildings, replacing individual AC units. It rejects waste heat away from street level, cutting energy use per unit of cooling and the anthropogenic heat that feeds the urban heat island.