The only exception to the across-the-map very high risk is the Azores island of Flores.

The Met Office advises wearing sunglasses with UV filter, hats and t-shirts as well as using parasols and sunscreen and avoiding children's exposure to the Sun.

In related news, twenty-six municipalities in the districts of Guarda, Castelo Branco, Santarém, Portalegre and Faro are today at maximum fire risk due to the high temperatures.