How to keep cities cool in face of global warming

Dear EarthTalk: Cities seem to be heating up fast more so than less urban areas. What can we do to keep them cool in the face of increasing global warming? — Paul Smith, Providence, R.I.


As global warming intensifies, cities worldwide are experiencing an accelerated rise in temperatures compared to less urban areas. This phenomenon, known as the urban heat island (UHI) effect, results from the concentration of buildings, roads and other infrastructure that absorb and re-emit heat more than natural landscapes. Addressing urban heat is crucial in the context of global warming to improve public health, reduce energy consumption and enhance the livability of urban environments.

One effective strategy is the implementation of green infrastructure. Urban green spaces, like parks and tree-lined streets, provide shade and cool the air through evapotranspiration, whereby heat is reduced as water evaporates from soil surfaces and transpires from plant leaves. Urban green spaces can significantly reduce the surrounding air temperature, offering a natural solution to urban heat.

White roofs can reflect up to 90 percent of sunlight, reducing heat absorbed by buildings.

Reflective and cool roofs are another strategy to mitigate urban heat. White roofs can reflect up to 90 percent of sunlight, significantly reducing the amount of heat absorbed by buildings. Several cities have successfully implemented white roofs, demonstrating their effectiveness in lowering urban temperatures. Cool roofs, made from lighter colored materials, offer another viable solution. These can be constructed from various materials, including reflective coatings, tiles and membranes. Implementing cool roofs helps reduce urban heat and contributes to energy savings by lowering the need for air conditioning.

Urban design and planning also play a key role in managing urban heat. Cool pavements, which include reflective and permeable materials, can greatly reduce heat absorption versus asphalt and concrete. Cities like Los Angeles have started using cool pavements, showing promising results. Other technological innovations offer advanced solutions for urban cooling. Smart shading systems, which adjust automatically based on the sun’s position, and other innovative technologies, can enhance the effectiveness of traditional methods. Urban climate modeling is another valuable tool that helps urban planners make informed decisions in implementing different heat mitigation strategies.

Globally, many cities have successfully implemented measures to combat urban heat. Singapore’s green roof initiative and Melbourne’s urban forest strategy have had significant impacts on local temperatures. Urban planners, policymakers and communities must adopt multi-faceted approaches and policies to create cooler, more resilient urban environments and protect the health and well-being of city dwellers.

EarthTalk® is produced by Roddy Scheer & Doug Moss for the 501(c)3 nonprofit EarthTalk.

The views expressed here are not necessarily those of The Lakeville Journal and The Journal does not support or oppose candidates for public office.

Latest News

Wake Robin Inn sold after nearly two years of land-use battles

The Wake Robin Inn in Lakeville has been sold for $3.5 million following nearly two years of land-use disputes and litigation over its proposed redevelopment.

Photo courtesy of Houlihan Lawrence Commercial Real Estate

LAKEVILLE — The Wake Robin Inn, the historic country property at the center of a contentious land-use battle for nearly two years, has been sold for $3.5 million.

The 11.52-acre hilltop property was purchased by Aradev LLC, a hospitality investment firm planning a major redevelopment of the 15,800-square-foot inn. The sale was announced Friday by Houlihan Lawrence Commercial, which represented the seller, Wake Robin LLC.

Keep ReadingShow less
Kent commission tackles Lane Street zoning snag
Lane Street warehouse conversion raises zoning concerns in Kent
By Alec Linden

KENT — The Planning and Zoning Commission is working to untangle a long-standing zoning complication affecting John and Diane Degnan’s Lane Street property as the couple seeks approval to convert an old warehouse into a residence and establish a four-unit rental building at the front of the site.

During the commission’s Feb. 12 meeting, Planning and Zoning attorney Michael Ziska described the situation as a “quagmire,” tracing the issue to a variance granted by the Zoning Board of Appeals roughly 45 years ago that has complicated the property’s use ever since.

Keep ReadingShow less
Kent P&Z closes High Watch hearing, continues deliberations

Kent Town Hall, where the Planning and Zoning Commission closed a public hearing on High Watch Recovery Center’s permit modification request on Feb. 12

Leila Hawken

KENT — The Planning and Zoning Commission on Feb. 12 closed a long-running public hearing on High Watch Recovery Center’s application to modify its special permit and will continue deliberations at its March meeting.

The application seeks to amend several conditions attached to the addiction treatment facility’s original 2019 permit. High Watch CEO Andrew Roberts, who first presented the proposal to P&Z in November, said the changes are intended to address issues stemming from what he described during last week's hearing as “clumsily written conditions.”

Keep ReadingShow less
google preferred source

Want more of our stories on Google? Click here to make us a Preferred Source.

Kent committee to review Swift House options

The Swift House in Kent has been closed to the public since the COVID-19 pandemic. A newly appointed town committee will review renovation costs and future options for the historic property.

Alec Linden

KENT — Town officials have formed a seven-member committee to determine the future of the shuttered, town-owned Swift House, launching what could become a pivotal decision about whether Kent should invest in the historic property — or divest from it altogether.

The Board of Selectmen made the appointments on Wednesday, Feb. 11, following recent budget discussions in which the building’s costs and long-term viability were raised.

Keep ReadingShow less

Kathleen Rosier

Kathleen Rosier

CANAAN — Kathleen Rosier, 92, of Ashley Falls Massachusetts, passed away peacefully with her children at her bedside on Feb. 5, at Fairview Commons Nursing Home in Great Barrington, Massachusetts.

Kathleen was born on Oct. 31,1933, in East Canaan to Carlton and Carrie Nott.

Keep ReadingShow less

Carolyn G. McCarthy

Carolyn G. McCarthy

LAKEVILLE — Carolyn G. McCarthy, 88, a long time resident of Indian Mountain Road, passed away peacefully at home on Feb. 7, 2026.

She was born on Sept. 8, 1937, in Hollis, New York. She was the youngest daughter of the late William James and Ruth Anderson Gedge of Indian Mountain Road.

Keep ReadingShow less
google preferred source

Want more of our stories on Google? Click here to make us a Preferred Source.

google preferred source

Want more of our stories on Google? Click here to make us a Preferred Source.