How vulnerable are Australia’s cities to extreme heat? Explore our maps

As the federal government warns the climate crisis will increase heat-related deaths, with the impact disproportionately borne by the already vulnerable, data obtained exclusively by Guardian Australia shows the parts of Australia’s major cities that are most vulnerable to heat.

The new measure, called the Heat Vulnerability Index and compiled by researchers at RMIT, combines temperature readings from satellites, with data on populations particularly susceptible to heat (such as older Australians and those with disabilities), the built environment and green space, and socioeconomic factors like income and education.

The data shows particularly high vulnerability in western Sydney and the outer suburbs of Melbourne, Adelaide and most other major Australian cities. But it also shows high