The number of immediately life-threatening (red) 999 calls to the ambulance service made each day was the second highest on record, and the proportion of these calls was the highest recorded.
Roedd nifer y galwadau 999 lle'r oedd bywyd yn y fantol (coch) a wnaed bob dydd i'r gwasanaeth ambiwlans yr ail uchaf ar gofnod, ac roedd cyfran y galwadau hyn yr uchaf a gofnodwyd erioed.