What impacts did climate change have on Europe during the 14th century (1300s) ?

During 14th century a climate change affected most of Europe during the 14 century, with heavy rains, cold temperature and wet weather for many years during summer and spring. The agriculture was affected due this long period of bad weather and all the food started to be limited. The crime and violence increased, everybody was hungry, sick and millions of people dying. This period is called The Great Famine (1315-1317).