The weight of snow can make buildings collapse. Crops freeze, and livestock can be killed. Sometimes, businesses have to be closed. The roads are blocked and airports shutdown, so all traveling can be stopped. Sometimes, people can't even get to the hospital.
Electrical wires can fall, causing loss of electricity and heat.
When a blizzard is over and all of the snow melts, there can be serious floods. People are also killed and injured in blizzards. The windchill factors, which are caused by the severe cold and wind, can cause many people to get frostbite. Frostbite is when your skin is exposed to cold air for a long time, sometimes causing it to freeze and permanent damage can result. Many times, fingers, toes, and even limbs have to be amputated.