Posted: Tue Mar 14, 2017 5:46pm
As it's a flat area, it's a sensible question. However, when we had the most extreme weather seen here for several decades, the Segura did flood and the several bridges were out of action for a while. However, Formentera itself is high enough above the Segura that you've no need to concern yourself.
During the recent floods several roads close to the river were out of action along with the bridges, and it was interesting to see just the tops of lemon trees poking out above the flood waters, with some completely submerged.