According to El Correo, engineers from Idom (company behind San Mames design) are evaluating the possibility of adding a retractable roof over the Bilbao stadium. Reasoning behind it has been known for months: despite vast roof over the stands, the north Atlantic wind and rain make people in the lower tier soaked on some matchdays…

Origen: Bilbao: Two options to close San Mames – StadiumDB.com