Heat island effect

heat island effect

[′hēt ‚ī·lənd i‚fekt] (meteorology) In urban areas with tall buildings, an atmospheric condition in which heat and pollutants create a haze dome that prevents warm air from rising and being cooled at a normal rate, especially in the absence of strong winds.

Heat island effect

A phenomenon that occurs in developed areas where the replacement of natural land cover with paving, buildings, roads, and parking lots results in an increase in outdoor temperatures. The heat island effect can be mitigated by vegetation, green roofs, and light-colored materials that reflect heat. Urban heat islands can be as much as 10 degrees Fahrenheit hotter than the surrounding undeveloped areas.