In September 2022 Typhoon Merbok, an extra-tropical storm, drifted northward into the Bering Sea and made landfall in western Alaska inundating a substantial portion of the Yukon-Kuskokwim (Y-K) Delta with floodwaters of several meters deep. This extensive storm caused damage to villages in the region and had the potential to disrupt the landscape because the coast was not yet protected by sea ice. In this project we (1) examined the extent of this storm and previous storms by looking for large woody debris that was deposited by the flood using aerial surveys, (2) surveyed ponds along the Kashunuk River in the central Y-K Delta for salinity and fine debris deposition that would indicate the ‘high water mark’ of the flood, and (3) examined soils and plants near Old Chevak, AK to determine the impacts of the flood. All sampling took place between May and August 2023. From aerial surveys, we located nearly 5000 pieces of woody debris, typically single or clusters of large logs. The majority of these logs were found at approximately 2.5 m above sea level, but many were found as high in elevation as 3.5 m. From river surveys, we observed fine debris deposited on the edge of the permafrost plateau at 3.9 m above sea level suggesting a substantial portion of the tundra in the region was flooded by the storm. Ponds along the Kashunuk River were saline toward the mouth of the river, but were low in salinity further inland. A comparison of ponds that were measured before and after the storm suggests that although the region was inundated by the Bearing Sea, pond water salinity did not increase. Our surveys of plants and soils, however, suggest some impacts of the flood. For example, soils on the permafrost plateau that were flooded were higher in salinity and pH and had greater thaw depth than soils that were not flooded. Respiration of carbon dioxide from these flooded soils was greater indicating the flood enhanced carbon loss from these carbon-rich ecosystems. We also found that the flood altered the timing of budburst and flowering in common species examined including dwarf birch, Labrador tea, and cloudberry and that altering the timing of these biological events likely contributed to the decline we observed in the key plant trait ‘leaf dry matter composition’ of these species. In this project we trained two graduate students, two undergraduate students, and one post-graduate technician in field sampling of pond water, soils, soil respiration, plant phenology (timing of biological activity), and the point intercept method of plant species composition. Three Master’s students also gained geospatial skills and experience through the geolocation of debris and creating the debris maps. We reported our findings in one presentation at the Fall Meeting of the American Geophysical Union and plan to report additional findings at the Annual Meeting of the Ecological Society of America and in two scientific publications. We have released or will soon release four data sets describing the locations of woody debris, pond water salinity, and impacts of the flood on soils and plants. We have also created an ESRI StoryMap describing the aerial survey activity and maps of the woody debris that are being shared with the residents of the village of Chevak, AK.