Severe wildfires are having a major impact on the environment in Canada and many other parts of the world. The effects typically include: increased airborne particulates; alterations to vegetation cover and soils; increased runoff and soil erosion; increases in debris flows and landslides; changes in river discharge, sediment transport and channel morphology; increased water temperature; and modifications to carbon and chemical fluxes. In turn, these have detrimental effects on human health and well-being, terrestrial and aquatic ecosystems, and water resources, amongst other things. This session addresses the causes and consequences of wildfires with emphasis on post-wildfire atmospheric, pedological, hydrological and geomorphological processes and impacts. Presentations that consider pre-and post-wildfire management implications and mitigation measures are also welcome.