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Municipal Politics

Vancouver’s Shady Inequality

The ‘heat dome’ reminds us, once again, how access to cooling urban forests is concentrated in wealthier areas.

Christopher Cheung 29 Jun 2021 | TheTyee.ca

Christopher Cheung reports on urban issues for The Tyee. Follow him on Twitter at @bychrischeung.

We all know about wealth inequality in expensive Vancouver. But there’s also inequality when it comes to who has the shade, and who’s left to scorch in the sun. In fact, this shady inequality is baked into the landscape of the city itself.

The average temperature of the city’s streetscape varies by more than 20 C between the coolest and hottest city blocks during the summer, according to the park board.

A key reason behind this? Trees and their shade.

Large urban centres tend to be more susceptible to extreme heat than their surrounding rural areas. Urban centres have fewer trees than rural areas, and more roads and buildings that absorb and store heat. This is called the “urban heat island” effect, and it’s why it’s important that cities grow their tree canopies as much as they can.

A 2018 report by Vancouver’s park board stressed the importance of the city’s urban forest as a protective measure for moments such as the current “heat dome” that’s sizzling the Pacific Northwest and breaking temperature records.

Vancouver typically experiences 18 summer days with temperatures above 25 C. But the 2018 report features climate change modelling that predicts we’ll have 43 such hot days each summer by 2050, over twice as many. Extreme heat events will also happen three times as frequently.

The report also identified vulnerable populations who live in areas with less tree coverage, which exposes them to higher risk of heat-related illnesses and death.

The Downtown Eastside, Marpole and parts of Vancouver’s southeast have the hottest streets. Factors such as isolation, mental illness, homelessness, substance use and physical disability all play a role in increasing heat-related harms.

The blue-highlighted parks across the city show us how important green space is.

VancouverHeatMapNeighbourhood.jpeg

Maps reported by The Tyee on where low-income residents live and where COVID-19 spread during the third wave show the same neighbourhoods highlighted.

Vancouver, still striving to become the greenest city on the planet, remains only green in patches.

582px version of TreesGraphicNeighbourhoodBenefits.jpeg
Trees aren’t often thought of as a type of infrastructure, but urban forests have huge roles to play. Note that trees can even deter crime. Yale researchers believe the reason is social. Trees encourage people to spend time near them, adding more eyes for surveillance. But even if residents aren’t around, trees imply care, deterring potential criminals from tight-knit areas where their activities might be noticed. Image from Urban Forest Strategy, 2018 update, City of Vancouver.

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