The Welsh Ambulance Service has just recorded its busiest 24 hours since New Year's Day, it has been revealed.
The NHS trust said it dealt with 1,495 incidents across Wales on Wednesday, August 12 - its second most eventful day of the year.
It was only second to January 1, 2020, when the service had do deal with 1,593 incidents in total.
The spell of hot weather, which saw temperatures reach well above 30C in Wales, was partly to blame for the spike in calls.
According to their latest figures, there was a 10% rise in incidents when comparing August 6-12 with the previous seven days (July 30 to August 5).
There was also an 18% increase compared to the same period last month (July 6-12) and an 11% rise on the same period last year (August 6-12, 2019).
On A-level results day, and with the warm weather set to continue into the weekend, the ambulance service is asking the public to act responsibly and only call 999 in a genuine emergency.
Lee Brooks, the trust’s director of operations, said: "Contrary to popular belief, demand on our ambulance service actually fell during the Covid-19 pandemic, but it's fair to say that normal business has resumed with regards to demand.
"Yesterday was our busiest day of 2020 so far after New Year’s Day, and the hot weather no doubt played a part in that.
"In high temperatures, more people call 999 with breathing difficulties and chest pain or because they feel faint and dizzy, but it can also make people's pre-existing conditions, like asthma or hay fever, worse.
"The sunshine also draws a large crowd to our beaches and rivers where accidents and mishaps in the water can occur.
"Through all of this, our crews show up and deliver the best possible care for those who need us, often in full PPE.
"Our plea today and every day is to use 999 responsibly so that we can be there for those who need us most, especially on this A-level results day, when students will no doubt be celebrating with their mates."
If you are ill and unsure what to do, the service urges people to visit 111.wales.nhs.uk for advice and information or to test their symptoms. Alternatively, visit a pharmacy, your GP or a minor injures unit.
You can also call 111 to speak to a nurse advisor, or 0845 46 47 if 111 is not yet available in your area.
