CASEI GEROLA, ITALY - MARCH 23: Drought is affecting northern Italy and the Po Valley, where half of the national livestock breeding is concentrated.The Po River, the longest in Italy with its 652 km (373 miles) length, in some points had reached a negative level.The scenario is similar to the one of last July when Italy experienced one of the most serious hydric crises in years. At Ponte delle Barche, a suspension bridge over the Ticino river that originates in the Swiss canton of the same name, only a few of the boats of the bridge are wet and touched by water. The rest are lying on dry stones. The situation is no different further down the river at the confluence of the Ticino and the Po.