Firefighters tackling deadly wildfires in central and northern Portugal had doused the flames in the Aveiro district, one of the worst-hit, as of Thursday, and were focusing on eight large blazes still raging elsewhere.

Portugal has declared a day of national mourning to mark the deaths of seven who died in wildfires that have burned through the country's west coast.

A state of calamity has been declared in Portugal after 100 wildfires left seven dead and endangered 210,000 people.