Urban heat island
From Citizendium, the Citizens' Compendium
An urban heat island (UHI) is a built up area that is hotter than nearby rural areas. The annual mean air temperature of a city with 1 million people or more can be 1–3°C warmer than its surroundings.
- U.S. Environmental Protection Agency, Heat Island Effect
- NASA, Welcome to the Thunder Dome: Atlanta's Urban Heat Alters Weather Patterns, 1999
- Daniel Boyce, The heat is on..., Southwest Research Institute.