She has published high impact research on integrating seasonal climate forecasts in early warning systems for infectious diseases in Latin America, the Caribbean and Southeast Asia. In 2018, she won the International Society for Neglected Tropical Diseases Water Award for Research, in recognition of the quality of her research on the linkages between hydrometeorological extremes and dengue outbreaks and the multi-sectoral relevance for policy and practice. Rachel has served as a consultant and advisor for impact-based forecasting projects for the Red Cross and Médecins Sans Frontières. She is a member of the World Meteorological Organization COVID-19 research task team and was a contributing author of the IPCC Sixth Assessment Report (WGII) chapter on risks across sectors and regions.