About half of the US had snow on the ground Tuesday, with temperatures falling to freezing in all 50 states. A massive snowstorm has wreaked havoc in much of the United States, bringing record low temperatures and leaving at least seven people dead. About half of the country had snow on the ground Tuesday, with temperatures falling to freezing in all 50 states, including Hawaii, according to the National... 

The American Midwest and Northeast have braced for a “polar vortex,” a megastorm that is expected to bring record low temperatures on Monday. So far extreme weather conditions have claimed at least 16 lives, paralyzed travel and caused power shortage. For those exposed to the inclement conditions frostbite and hypothermia will be a danger as – 31°C is expected in North Dakota, –...