An experiment was conducted from 5 August to 13 December 2020 to assess the performance of eight Aman rice cultivars under the Direct Seeded Rice (DSR) method at farmers’ fields in flash flood-prone areas of Hathkhola Sylhet. BRRI dhan32, BRRI dhan51, Meghraj, Moinasail, Maloti, Jori, Badal, and Binni rice cultivars were studied in a randomized complete block design (RCBD) with four replications. After 15-days flash flood, the rice cultivars Meghraj, Moinasail, and BRRI dhan32 and dhan51 survived, but others were damaged. Data were collected only from survived varieties. Agronomic characteristics differed in different rice cultivars. The results showed that the modern variety BRRI dhan51 produced the shortest plant height (70.30 cm), whereas the native cultivar Moinasail produced the tallest plants height (124.60 cm). BRRI dhan51 produced the highest number of effective tillers m^-2 (337.25) while Meghraj produced the least effective tillers m^-2 (170.50). Number of filled grains panicle^-1 was highest (134.60) in BRRI dhan51 and cultivar Moinasail produced the lowest number of grains panicle^-1 (55.55). The highest weight of 1000 grains (20.44 g) and yield of grains (5.34 t ha^-1) were recorded from BRRI dhan51 which was similar to BRRI dhan32 (5.14t ha^-1). Meghraj had the lowest grain yield (3.03 t ha^-1) which was at par with Moinasail. Results indicated that submerged tolerant var. BRRI dhan51 and the other three varieties (BRRI dhan32, Meghraj, and Moinasail) could be used in Aman rice seasons in flash flood-prone areas.