More than 100 wildfires are stretching thousands of firefighters to the limit in northern Portugal

Nearly a month after wildfires blazed on the Portuguese island of Madeira, more fires have broken out in mainland Portugal . Seven people have reportedly died so far in the fires, which are spreading between the northern district of Aveiro and Porto .

Portuguese police have arrested 14 suspected arsonists this week, who may have set some of the dozens of deadly wildfires raging across the country, contributing to the fire risks stemming from climate change and rural depopulation.