In June 2021, the proportion of all calls that were immediately life-threatening (red calls) was 7.9%, up from 7.4% in May 2021.
Ym mis Mehefin 2021, roedd cyfran yr holl alwadau lle mae bywyd yn y fantol (galwadau coch) yn 7.9%, i fyny o 7.4% ym mis Mai 2021.