PITTSBURGH - Ever travel into downtown Pittsburgh and think, "Wow, it feels even hotter here than it did at home?" It's not your imagination. It usually is hotter, especially on dry, sunny days.
It's called the "Heat Island Effect". The temperature downtown can often be three to seven degrees warmer in the city than in the suburbs. The two main reasons are the buildings, which trap solar radiation and help build heat in the city, and the lack of vegetation in the city means less evaporation from plants and trees.
Heat Island Effect— Scott Harbaugh (@WPXIScott) July 18, 2019
Thinks it's hot at your house this weekend? Try hanging out in the city where buildings and lack of vegetation make it even hotter. pic.twitter.com/y7s9bJntbg
That lack of evaporation means less cooling ability for the air just above the surface.
The end result is the sweat factor in the city is often higher than it is in your own backyard.
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