In October, the proportion of all calls that were immediately life-threatening was 13.7%, up from 12.5% in September and also the second highest on record.
Ym mis Hydref, roedd cyfran yr holl alwadau lle’r oedd bywyd yn y fantol yn 13.7%, i fyny o 12.5% ym mis Medi, a’r ffigur uchaf ond dau erioed.