This Incident Brief by the United Nations University Institute for Water, Environment and Health (UNU-INWEH) provides a rough estimate of the value of the threatened properties by Hurricane Helen based on synthetic aperture radar (SAR) data from the Sentinel-1 satellite of the European Space Agency. The analysis is focused on seven cities, which were reportedly hit hardest by Helene, namely Asheville, Black Mountain, and Chimney Rock in North Carolina, Greenville in South Carolina, Steinhatchee and Tampa in Florida, and Valdosta in Georgia.