Morriston Hospital's Clinical Director for Emergency Medicine has issued a plea to the public to enjoy the heatwave responsibly.
Mark Poulden said the health service is already extremely busy and may not be able to respond or offer treatment for heat-related illness and injury as quickly as you would like.
Here's his full statement - with top tips for staying safe below.
"The heatwave is putting additional strain on a health service that was already experiencing high demand for all services from GPs through to emergency departments (A&Es).
Like emergency departments across Wales, Morriston Hospital has been seeing higher numbers of sicker patients coming through the doors for some time. As the Welsh Ambulance Service is under extreme pressure, we have begun seeing patients walk in with life-threatening conditions.
All of this has a knock-on effect of increasing waiting times for those with less serious injuries or illnesses.
Now we are seeing patients arriving with weather-related injuries too.
We have seen a number of sunburn cases, but thankfully they were mostly relatively minor. And we’ve seen some people who have been injured doing outdoor activities in the nice weather.
So, our message to the public is enjoy the nice weather. It’s very good for our general wellbeing. But please be careful as the health service is already extremely busy and may not be able to respond or offer treatment for heat-related illness and injury as quickly as you would like."
Here are his top tips for staying safe.