WP 2 focusses on the physical processes of natural hazards and their interaction with human systems. This is done in two parts: (i) multi-hazard interactions impact on infrastructure networks and (ii) climate downscaling for urban planning and incorporation into decision making. This research requires original ways to collect and interrogate data on hazards and impact in an African development context; and novel approaches to modelling hazard impact upon the built environment. Work will target Karonga, Nairobi and to a lesser extent Ibadan.