Top Definition
The effect on Long Island whereby the western regions of the island are generally warmer due to the closer proximity of the mainland (where there is more land mass heat being generated) and the population gets denser (which creates more radial heat from electricity, heaters, cars, etc...).
As you move from Montauk to Brentwood you can really notice a difference in the air temperature due to the urban heat island effect.
by Mark Kessel January 19, 2008

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