Hannah is a Professor of Hydrology, University of Reading. She advises the Environment Agency, the European Centre for Medium-range Weather Forecasts, the Copernicus Emergency Management Service, local and national governments and humanitarian agencies on the forecasting and warning of natural hazards. She is a member of the UKRI Natural Environment Research Council, a fellow of the European Centre for Medium-range Weather Forecasts and a fellow of the Centre for Natural Hazards & Disaster Science in Sweden. Her research is funded by the UKRI Engineering & Physical Sciences Research Council, the UKRI Natural Environment Research Council and the Foreign, Commonwealth & Development Office.