More than 1,000 firefighters and nine water-dropping aircraft are battling the blaze in Pedrogao Grande, which is raging for a third consecutive day.

The Civil Protection Agency said it hoped to contain the flames on Tuesday, though temperatures forecast to reach 43C (109F) and gusting winds remain a threat.

The death toll was raised from 63 to 64 late on Monday.

Government officials said Prime Minister Antonio Costa has ordered an investigation into what happened on Saturday night, when the deaths occurred.