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On 14 August 2017 heavy rainfall around Freetown, Sierra Leone, caused major landslides that buried several hundred houses. The UN responded immediately with support for those affected, and initial plans were drawn up to rebuild homes and residential districts. However, it was first essential to identify where buildings can be erected safely and where future construction must be avoided.

Track Your Build, which aims to prevent future disasters through good planning, helps to provide answers to these key questions. The start-up creates maps for risk assessment using data captured with drones and it also provides evaluations of this digital data. Equipped with Track Your Build’s risk maps, urban planners can plan roads, power lines, fibre-optic cables and water supply and waste water disposal systems that are, as far as is possible, future-proofed against extreme weather events. Track Your Build works for the UN and development cooperation organisations.