This PICO session will address natural hazards and associated risk evaluations in developing countries, including the role of humans in magnifying or decreasing those hazards. In developing countries, hazard and risk analysis presents specific challenges such as (i) data collection, (ii) rapid informal and unplanned development creating large demands on services and infrastructure, (iii) complex natural-human systems, (iv) limited resources and capacity, (v) climate change and (vi) communication between science, policy and the public. Here, we define “developing countries” as countries/regions with a low to medium human development index, according to the United Nations. We welcome submissions from a range of stakeholders to share their innovative theoretical and practical ideas and success stories of how risk can be understood and addressed in urbanised areas across developing countries. Presentations will cover a variety of topics including: database and archive construction; modelling, instrumentation and tools; conceptual understanding of multi-hazards and complex natural-technological systems; and communication and policy. We particularly welcome abstracts focused on urban areas in developing countries, as the rapid urbanisation of developing countries may result in significant accumulation of risk in the coming years. We anticipate a lively discussion and the sharing of best practice and novel ideas to reduce the impact of hazard events in developing countries.