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 says it hopes to contain the flames Tuesday, though temperatures forecast to reach 43 degrees Celsius (109 Fahrenheit) and gusting winds remain a threat.
The death toll was raised from 63 to 64 yesterday.
Government officials say Prime Minister Antonio Costa has ordered an investigation into what happened on Saturday night, when the deaths occurred.
Disclaimer: No Business Standard Journalist was involved in creation of this content