Satellite surface heat, aerial tree cover, census population and age, home air conditioning and the walk to a cool place, scored for every neighborhood area of a city — then a planting scenario with tree counts and indicative cost. Five builds. Pick one.
The whole county: 2022 aerial tree cover, ACS 2024 population, Census A/C estimates, routed walking time, a data & methods guide, the county cooling directory and scenario export. Half of residents live in areas under 15% tree cover. Surface heat is shown but not scored here, because at county scale it mostly tracks distance from the Bay.
The hottest of the three. Half its areas have under 4% tree cover and 93% of residents live below 15%, under some of the state's hottest summer ground. Heat is scored here: one valley climate, so hotter really means hotter.
One city inside Contra Costa at seven times the resolution. Shade and surface heat track each other closely here (r = −0.60), and nearly every home has A/C, so A/C is not scored.
The west side of the county at seven times the county map’s resolution: Richmond, San Pablo, El Cerrito, Pinole, Hercules and the unincorporated places between them. Half of residents live in areas under 10% tree cover. Heat is scored here: within West County a hotter area is mostly a barer one.
Pittsburg and the unincorporated Bay Point community next to it, at seven times the county map’s resolution. Together they hold 15 of the county map’s 100 highest-need areas. Half of residents live in areas under 10% tree cover. Heat is shown but not scored here: a hotter area is mostly one farther from the shore, not one with fewer trees.