Highwater Mark Collection after Post Tropical Storm Dorian and Implications for Prince Edward Island, Canada

Prince Edward Island (PEI), Canada has been experiencing the consequences of a rising sea level and intense storms on its coasts in recent years. The most severe event, Post Tropical Storm Dorian (Dorian), began impacting 7 September 2019 lasted for over 20 h until morning 8 2019. measurement highwater marks (HWM) from storm was conducted between 25 October using high precision, survey grade methodology. HWM measured included vegetation lines, wrack beach, cliff, dune morphological features, tide gauge data at 53 locations Province along coastal areas that are exposed to tides, surge, winds, wave runup. Photos were taken provide evidence nature locations. reveal caused extensive floods many North South Coast Prince, Queens Western Kings Counties Island. reached elevations excess 3.4 m some locations, posing threats local infrastructure causing damage natural features such as sand dunes these areas. can useful information community emergency response organizations plans developed cope with increased frequency events predicted by researchers. As significant several PEI, better planning an enhanced forecasting flood warning system, conjunction stage values, could possibly have reduced impacts impacted This help enhance public understanding potential how they prepare adapt future.