Desc: Si llega a ser de Noche. 50 Años de la Riada. 19 de Octubre de 1965: Directed by Juan Antonio Guerrero Escobar. The 1965 flood in Chiclana de la Frontera was caused by heavy rains, leading the Iro River to overflow. It caused major damage to homes and farmland, but no casualties. This event prompted improved flood prevention in the town.