Repair works are already being planned, and our teams are working relentlessly to assess the damage and restore the tunnel to allow it to reopen as soon as it is safe to do so.
Mae gwaith trwsio eisoes yn cael ei drefnu, ac mae ein timau'n gweithio'n ddi-baid i asesu'r difrod ac adfer y twnnel er mwyn iddo ailagor yn ddiogel cyn gynted ag y bo modd gwneud hynny.