Hekla is one of the most active volcanoes in Iceland, with recent eruptions in 1970, 1980-81, 1991, and 2000. The last three eruptions occurred in the early months of the year when the volcano was heavily snow-covered. As a result, tephra and effusive deposits have covered large amounts of snow and ice causing an insulation effect. Using photogrammetric processing and GIS analysis of historical aerial photographs (1945-1982), recent Pléiades satellite tri-stereo images (2022 and 2023), and UAV data acquired during the 2022 and 2023 fieldwork, we found evidence of intense cryospheric processes such as rock glacier emplacement and multiple thermokarst formations. Our results show that the NW flank of Hekla is covered by 6 distinct rock glacier lobes that were recently (after 1982) emplaced atop previously formed rock glaciers identified in 1945-1982 datasets. The total area of the recent rock glaciers is about 2 km2. The longest lobe reaches 1.4 km in length and has a 50 m front thickness. The lobe has advanced by 13 m over 1 year (2022-2023). The newly emerged thermokarst sinkholes have been observed in the field in the summit area and on the NE flank. These aspects of Hekla's evolution may play a significant role in the magnitude of hazards in case of future unrest. The emplacement of lava along rock glaciers and permanent snow raises the risk of impending lahars. Volcanic heat can expedite permafrost degradation and the advancement of rock glaciers, culminating in significant landslides.