Sangüesa was the largest flood recorded in the Basque Country. In the evening, the trunks of the mills closed and blocked the Yesa stone bridge, accumulating water and others. The water pressure in the Aragon River ended up cracking, causing floods that reached a height of two meters. It completely crushed Sangüesa (destroying 428 of building 465) and caused 556 deaths, one fifth of the population. As a result of the event, the people settled in higher lands, far from the Aragon River.