Dr Timothy English is a Senior Lecturer in Heat and Health at the University of Sydney and is a co-lead for the Humanitarian Settings theme within the Heat and Health Research Centre. His work sits at the intersection of physiology, public health and implementation science, with a focus on reducing preventable heat-related illness among people experiencing homelessness.

Tim is the research lead for the Co-designed Mobile Cooling Hubs program – pop-up, community-embedded heat relief sites that provide shade, electric fans, cold water spray and drinking water, delivered in partnership with homelessness and health services and people with lived experience. The model is being piloted in Sydney with the aim of refining it into an evidence-informed “blueprint” to support scale-up in other Australian cities. His research combines real-world field evaluation (including physiological and perceptual heat-relief outcomes), lived-experience and service-partner insights, and pragmatic monitoring approaches designed for low-barrier community settings.

He has secured funding and in-kind support through cross-sector partnerships, including City of Sydney and St Vincent’s Hospital Sydney (Homeless Health Service), and collaborates with academic partners nationally to build the evidence base for mobile, low-barrier cooling interventions. Tim is lead author on a recent Medical Journal of Australia perspectives piece on protecting people experiencing homelessness from extreme heat and regularly contributes to policy and media discussions on equitable heat protection.

Tim is also the founder of the Australian Climate and Homelessness Alliance (ACHA), convening stakeholders across health, housing, government and community sectors to strengthen climate protection for people facing homelessness across Australia.