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Heat Island Effect


Welcome to EPA's Urban Heat Island Newsroom. The Newsroom provides current news and links to news releases related to urban heat island impacts, mitigation strategies, and community initiatives. To help keep you up to date, you may also wish to sign up for EPA's Urban Heat Island Newsletter. Older stories can be found in the Newsroom Archive.

September 2014

August 2014

  • Milwaukee Metropolitan Sewer District Announces Partnership to Promote Stormwater Management SystemExit EPA Disclaimer (August 5, 2014) – The Milwaukee Metropolitan Sewer District announced a partnership to monitor the performance of a new stormwater management system that combines a blue roof with a green roof to harvest rainwater and control its release. While the project was not designed specifically to reduce heat islands, the green roof provides cooling as a co-benefit.

  • Levi’s Stadium in Santa Clara, California, Installs Green RoofExit EPA Disclaimer (August 8, 2014) Levi’s Stadium in Santa Clara, California, features a 27,000-square-foot green roof that is planted with grasses and native plants, captures rainwater, and grows herbs for stadium food. Harvested rainwater is used in all toilets and to irrigate the playing field.

  • Odette Estate Winery in Napa Valley, California, Installs Green RoofExit EPA Disclaimer (August 14, 2014) – The Odette Estate Winery in Napa, California, installed an 8,500-square foot green roof that harvest rainwater in an underwater irrigation system to prevent water from evaporating.

  • Washington State Department of Natural Resources Announces Urban Forest Restoration at Forest Park In Everest, WashingtonExit EPA Disclaimer (August 15, 2014) – The Washington State Department of Natural Resources announced an urban forestry restoration project at Forest Park in Everest, Washington, to remove invasive species and plant new trees.

  • Spokane, Washington Begins Tree Planting InitiativeExit EPA Disclaimer (August 15, 2014) – The city of Spokane, Washington, approved the “Forest Spokane” program, which intends to plant 10,000 new trees in the next two years.

  • Climate Central Ranks Urban Heat Island Effect in U.S. CitiesExit EPA Disclaimer (August 20, 2014) – Climate Central has released a report that analyzes impacts of the urban heat island effect in 60 of the largest U.S. cities over the past 10 years. The analysis finds that, on average across the 60 cities, the maximum single-day temperature difference between urban and rural areas was 17.5°F, and the three cities with the most intense urban heat island effect are Las Vegas, Albuquerque, and Denver. The study also found that in three quarters (45 of 60) of the cities examined, urbanized areas are warming faster than adjacent rural locations. On average across all 60 cities, urban summer temperatures were 2.4°F hotter than rural temperatures. The difference was more pronounced at night, with average summer overnight temperatures more than 4°F hotter in cities than in surrounding rural areas.

  • Fire Station in Deltona, Florida Installs Cool RoofExit EPA Disclaimer (August 19, 2014) – A fire station in Deltona, Florida is constructed with both a cool roof and a green roof.

  • Price of Green Roofs Projected to Decrease by 2017Exit EPA Disclaimer (August 21, 2014) – Lux Research, an independent research and analysis firm, released a study estimating that the cost of green roofs will decrease from the current price of $38 per square foot to $23 by 2017.

  • Minnesota Creates Stormwater Crediting SystemExit EPA Disclaimer (August 28, 2014) – Minnesota developed a credit system that incentivizes communities to invest in trees, rather than stormwater pipes. The system gives credit to properly planted trees that reduce stormwater runoff. While the credit system was not designed to address urban heat islands, trees help reduce heat as a co-benefit.

July 2014   

June 2014                                                                             

May 2014

April 2014

March 2014


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