"There were more emergency ambulance calls in August 2021, than in any other August, since comparable data was first collected in October 2015.
"Roedd mwy o alwadau ambiwlans brys ym mis Awst 2021 nag mewn unrhyw fis Awst arall ers i ddata tebyg gael ei gasglu gyntaf ym mis Hydref 2015.