Where Cooling Works

Hex grid coloured by surface temperature (blue = cool, red = hot). White-outlined hexes are "cool spots" — dense residential areas with adequate tree canopy that are measurably cooler.

Cool spot criteria: mean canopy ≥20% within 60m, surface temperature below city 25th percentile, residential density ≥8 dwellings/ha. Hex resolution ~400m. Surface temperature from Landsat 9 (30m). Canopy: Meta/WRI 1m (2020). Unpublished analysis by Dr Thami Croeser, June 2026.