Complex sentence: The region north of Cansiglio, called "Conca d'Alpago", received severe damages, too: 50 to 70 percent of the buildings in the towns of Puos d'Alpago and Cornei received critical damage and became unfit for use.
Split into simpler sentences: The region north of Cansiglio, called "Conca d'Alpago", also experienced severe damage. Fifty to seventy percent of the buildings in the towns of Puos d'Alpago and Cornei received critical damage and became unfit for use.