Urban Trees Are Vital in an Era of Extreme Heat

Urban trees are essential for cooling public spaces, promoting physical activity, and protecting vulnerable populations from extreme heat.

2 minute read

August 29, 2024, 6:00 AM PDT

By Clement Lau


Cyclist and runner on paved bike and pedestrian path in a park in Boston with fall colors on trees.

jStock / Adobe Stock

As climate change intensifies, record-breaking heat has become a leading public health threat, not only by causing direct heat-related deaths but also by discouraging outdoor physical activity. The rising temperatures make parks, streets, and recreational spaces dangerously hot, posing risks to those who rely on these areas for exercise and leisure. Maintaining physical activity is crucial for both physical and mental health, yet the increasing heat threatens to reduce the number of people engaging in outdoor activities, particularly in urban areas where shade is scarce.

As Nadina Galle and Jad Daley share in this article, urban trees offer a powerful solution to this problem by providing natural cooling through shade and evapotranspiration, which can lower temperatures by up to 45 degrees Fahrenheit. By strategically planting trees in key recreational areas, cities can create cooler, more comfortable environments that encourage safe outdoor activity even during extreme heat. Initiatives like Phoenix's “Cool Corridors” demonstrate how targeted tree planting can address both environmental and social equity, ensuring that all neighborhoods have access to the cooling benefits of trees.

In addition to promoting active lifestyles, trees play a critical role in protecting vulnerable populations, such as children and the elderly, from the dangers of extreme heat. Shaded public spaces allow for safer outdoor activities, reducing the reliance on air conditioning, which many cannot afford. With growing investments in urban forestry, such as the $1.5 billion from the Inflation Reduction Act, expanding tree cover in disadvantaged neighborhoods is essential for creating heat-resilient communities and safeguarding public health in a warming world.

Monday, August 26, 2024 in Medium

Young Professional

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban and Environmental Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban and Environmental Planner

Get top-rated, practical training for planners

"Planetizen federal action tracker" logo superimposed over black and white image of US Capitol dome.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

4 hours ago - Zachary Whalen

Overlapping highways

The state-sanctioned urbicide of Austin

People don’t kill cities. Freeways do.

September 8, 2026 - Benjamin Schneider

The Hoover Dam blocking the Colorado River. The river's water level is noticeably low. The cliffs surrounding the blue water are brown and jagged.

US to reduce Colorado River water deliveries to Mexico

A new Colorado Treaty amendment reduces Mexico’s Colorado River water allocation by 250,000 acre feet.

September 11, 2026 - The Arizona Republic

A cluster of wind turbines beneath a stormy sky, above a forest where the leaves are beginning to change colors.

5 New England states march closer to 800 megawatt wind energy project

Securing federal approval for the project may be complicated under the Trump administration, which has historically been hostile towards domestic wind power.

16 minutes ago - Inside Climate News

People boarding a bus on Maryland's Orange Route.

Baltimore to break ground on $50 million Transit Priority Project

The project will bring faster bus trips, safer streets and better bike connections to Baltimore.

1 hour ago - Mass Transit

A brick building with a circular sign with the Airbnb logo hanging off of it.

Airbnb launches $250 million 'last-dollar financing' housing accelerator, makes first investment in Austin

The company will put $6.4 million towards affordable housing development in Texas’ capital.

2 hours ago - Smart Cities Dive

FREE Course: Walkable City 1: Why Walkability?

After describing his path towards focusing on walkability as the essence of good planning, Jeff Speck marches through his five principal reasons for making more walkable places.

Reinventing Malls: Planning Alchemy—Turning Gray Fields Into Gold

The course focuses on the opportunities and imperatives that shape reinvention of mall sites.