This session will highlight recent research into the impact of climate change upon urban trees and the ability of the collective urban forest to adapt to these increasingly harsh conditions whilst maintaining tree and habitat biodiversity as well as ecosystem service benefits to urban residents. The objectives are to provide a global overview of research directions into urban tree resilience to heat and drought and different approaches to future species or provenance selection. This will include trait-based analysis of urban tree populations, physiological analysis of trees to extreme environmental stress and meta-analysis of past urban ecosystem adaptation studies. There is great interest in better understanding how our urban forest composition will change as this has ramifications for urban society with regards to: a sense of place and identity, mental health and well-being, biodiversity and habitat, cooling and microclimate, human thermal comfort, the urban heat island, flooding and catchment hydrology.