Urban Mitigation and Building Adaptation to Minimize the Future Cooling Energy Needs

•Global and local climate change cause overheating in coastal cities like Sydney.•We modelled 2018 and 2050, with and without land-use change and heat mitigation.•We performed energy simulations assessing building adaptation technologies.•Mitigation technologies are not enough to counteract global and local climate change.•Building adaptation and urban mitigation must be combined.