Firefighters battle a blaze in in the heart of Portugal's Serra da Estrela National Park, which has been raging for the past four days. The fires, according to estimates, have already destroyed more than 4000 hectares of forest." We were able The fires, according to estimates, have already destroyed more than 4000 hectares of forest. "I have never, ever seen anything like this. It's a catastrophe, it breaks my heart," says 69-year-old Duarte, a local resident. IMAGES AND SOUNDBITES