Health expert Marcus Longley warned that changes to the NHS in Wales, with fewer major A&E departments, could make the pressure on ambulances transferring patients worse, as response distances and times are increased.
Professor Longley said, though, that current problems lie within the system more broadly, and "the health service needs to get ahead of the problem, rather than just forever scrambling to catch up with it."
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Showers for a time tonight but these will ease and under clear skies temperatures will fall well below freezing.
Danielle Sampson learnt about 'rescue breathes' around two years ago on the day-time television programme.