More than 100 forest fires have been raging in the north of Portugal since last weekend. The regions of Aveiro, Porto and Viseu are particularly affected. Thousands of firefighters are battling a 13-kilometer-long fire front.

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.

An anticyclone combined with high temperatures has created “a cocktail of dangerous conditions” north of Lisbon.