In this episode, Susan Mathews speaks with Dr. Bharat Jayram Venkat about the unequal distribution of the effects of heat. For this, we travel to 19th and early 20th century colonial India where heat is a persistent problem for the British empire and a burgeoning climate science is sutured to racial difference. These histories inform contemporary crises as knowledges of heat continue to evolve in an unequal world. Dr. Bharat Jayram Venkat is an associate professor at UCLA’s Institute for Society and Genetics with joint appointments in the Departments of History and Anthropology. His current work focuses on the experience of thermal inequality in contemporary India and the United States, the history of how heat has been studied and its effects over the long twentieth century. He is also director of the UCLA Heat Lab. With accelerating climate change, one of the fallouts is extreme heat. In this conversation, Dr. Venkat defined thermal inequality, which is not just the differential impact of heat, but the unequal distribution of heat effects. These effects are filtered or mediated by our environments, by our lives and by the social and political infrastructures that determine how vulnerable we are to heat. The UCLA Heat Lab employs interdisciplinary methods to study the experience of thermal inequality. We spoke in some detail about a journal article he wrote in 2022 on race and thermal sensation in late colonial India. We discussed ‘tropicality’, how central the problems posed by heat were and how various kinds of bodies were understood to be differentially affected by heat, producing both biological variation and pathology. Meteorology and racial ideology intersect in the late 19th and early 20th century and climate science is sutured to racial difference. The Subverse is the podcast of Dark ‘n’ Light, a digital space that chronicles the times we live in and reimagining futures with a focus on science, nature, social justice and culture. Follow us on social media @darknlightzine, or at  for episode details and show notes.