UV ratings are in the red across the country, and are either at 9 or 10 on a scale from 1 to 11.
People are advised to avoid sun bathing, especially from noon to 4pm, while also always wearing t-shirts, sunglasses, hats, sun cream while ensuring that children remain indoors.
The alert is in place for at least the coming two days, with temperatures set to reach 30 degrees Celsius in the Algarve