More than 100 wildfires are stretching thousands of firefighters to the limit in northern Portugal. The country’s worst spate of fires in recent years is blamed for seven deaths since they spread out of control over the weekend.

Portugal is battling one of its worst wildfire outbreaks in recent years, with over 100 fires being fought by firefighters and volunteers.

Three firefighters died battling the blazes, Portugal’s prime minister said, adding the country was going through “difficult days.”