If you can’t talk in safety, but you need help immediately, police forces across Wales will respond to a silent 999 call – dial 999 followed by 55 to indicate that you can’t talk, but need help.
Os nad yw'n ddiogel i ddioddefwyr siarad, bydd yr heddlu'n ymateb i alwad 999 dawel – galwch 999, ac yna 55 pan fydd rhywun yn ateb i ddangos na allwch siarad, ond bod angen help arnoch.