Firefighters were reportedly called to the exclusive resort area of Quinta do Lago after fires broke out in some private villas and part of a golf course near Faro, with some holidaymakers evacuated as a precaution.
According to Reuters, nearly 900 firefighters have been combating three active blazes in Leiria alone, while 2,841 firefighters are tackling fires across mainland Portugal.
Temperatures have reached 47 degrees celsius in some parts of the country with the highest readings expected in the Santarem and Castelo Branco districts.