February 13, 2017, 10am PST
Los Angeles has a heat problem, and it's getting worse. But the Mayor's Office is taking on the challenge.
September 24, 2015, 12pm PDT
No, this is not a trick question. By definition, you'd think the answer is L.A., where the heat is generated, but it's actually San Bernardino, 56 miles to the east. Turns out that like ozone, heat is transported by the wind.
February 5, 2014, 7am PST
Researchers at the Lawrence Berkeley National Laboratory recently completed an economic analysis of white roofs versus their green and black counterparts. The debate over the relative merits of white versus green roofs is far from over, however.
December 20, 2013, 12pm PST
In case you haven't heard, L.A. gets a lot of sun. While this is great for getting a tan, it presents a challenge for mitigating the heat island effect and rising temperatures. New legislation requires that the roofs of new homes help beat the heat.
May 8, 2013, 11am PDT
Recent analysis shows that Louisville, Ky. suffers from the worst 'heat island' conditions among America's 50 largest cities. The city is also one of the few without a tree ordinance. Coincidence? Sarah Goodyear investigates.
April 3, 2013, 12pm PDT
More than a third of the land in our cities is covered by black asphalt, an exemplary heat trapping surface and major contributor to the urban heat island effect. Researchers at Lawrence Berkeley Lab are studying "cool pavement" alternatives.
May 25, 2012, 12pm PDT
Emily Badger reports on pioneering research that is looking into ways to utilize the heat trapping properties of asphalt, rather than fighting it.
September 26, 2009, 7am PDT
Under a new service program called NYC Cool Roofs, volunteers are painting New York's rooftops white to try to lower urban temperatures and save energy.
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