How are our cities going to look in a rapidly heating world? It won’t be long and 50C will be normal | James Bradley

Hot weather bakes in disadvantage. Regenerating natural and living ecosystems will help us all

A century ago the British critic and crime writer GK Chesterton declared that crime fiction is the poetry of the city. Chesterton's point was that the city is more attuned to the poetry of contemporary life than the country, but his observation also hit upon something no less important, which is that the structures that shape social and economic life are visible in their concentrated forms in the urban environment.

This is especially true when it comes to the impacts of global heating. As our cities get hotter the inequities embedded in them are intensifying rapidly. A 45C day in Sydney's inner city isn't fun, but residents of the affluent suburbs close to the centre tend to live in well-appointed, air-conditioned houses and apartments, as well as enjoying easy access to beaches, parks, pools and libraries where they can find refuge from the heat.