Raging forest fires in central Portugal have killed at least 57 people, many of them trapped in their cars, in what Portuguese Prime Minister Antonio Costa says is "the biggest tragedy of human life that we have known in years."
The death toll initially stood at 25 in the early morning and Sunday's updated figure was given by public broadcaster RTP, citing Interior Ministry official Jorge Gomes.
The fatalities occurred in the Pedrogao Grande area, about 150km northeast of Lisbon, where about 600 firefighters have been trying to put out the fires since Saturday, Mr Gomes said.
Mr Gomes said that at least 16 people were killed when their vehicles were engulfed by flames on a road between the towns of Figueiro dos Vinhos and Castanheira de Pera, and three others died from smoke inhalation in Figueiro dos Vinhos.
A huge wall of thick smoke and bright red flames towered over the top of trees near houses in the wooded region.
Local resident Isabel Brandao told The Associated Press that she had feared for her life.
"Yesterday we saw the fire but thought it was very far. I never thought it would come to this side," she said.
"At 3:30am, my mother-in-law woke me up quickly and we never went to sleep again. We were afraid the fire would reach us."
RTP said there are at least another 20 people injured, including six firefighters. Fourteen of the injured were in serious condition, RTP said.
Spanish state television showed terrifying images from Portugal of several people on a road trying to escape the intense smoke that had reduced visibility to a question of a few metres. A young man shared a bottle of water with a distraught woman as she stumbled down the road.
Mr Costa said that firefighting crews were having difficulties in approaching the area because the fire was "very intense."
He added that Portuguese authorities were working on identifying the victims.
Mr Costa said while investigations are ongoing to determine the cause of the fire, authorities believe the high temperatures of 40degC in recent days may have played a part.
"This is a region that has had fires because of its forests, but we cannot remember a tragedy of these proportions," said Valdemar Alves, mayor of Pedrogao Grande.
"I am completely stunned by the number of deaths."