While moving across southwestern Haiti, Hurricane Flora produced winds of up to near Derez, while the capital city of Port-au-Prince reported peak winds of . Intense rainbands dropped torrential precipitation estimated at over in Miragoâne, with one location recording over in three days. One location in the southwestern peninsula recorded of precipitation in 12 hours. The storm surge on the southern coast is unknown, but estimated to exceed . Flash floods from the hurricane washed out large sections of several towns, while mudslides buried some entire towns, resulting in many deaths. Heavy rainfall led to river flooding along the Grise River, which crested at above normal. The flood waters created new channels and washed away entire banana plantations.