Thermal environment of the cliff collapse observed in the Aswan region. Upper-left panel: two OSIRIS/NAC images of the Aswan cliff before and after the collapse, adapted from Pajola et al. (2017). Upper-right panel: temperature as a function of time and depth at the site of the cliff collapse, similar to Fig. 9. Lower-left panel: duration of polar night, extracted from Fig. A.1. Lower-right panel: maximum depth for water, extracted from Fig. 11. In all panels, the yellow box indicates the location of the cliff collapse.