Mae Coleg Brenhinol Meddygaeth Frys (RCEM) a Choleg Brenhinol y Meddygon wedi mynegi pryder ynghylch diogelwch pobl a staff, os bydd adrannau argyfwng yn mynd yn orlawn.
The Royal College of Emergency Medicine (RCEM) and the Royal College of Physicians have expressed concerns about the safety of people and staff if emergency departments become over-crowded.