About Cold Wave
A cold wave is a weather phenomenon that is distinguished by a cooling of the air. Specifically, as used by the U. S. National Weather Service, a cold wave is a rapid fall in temperature within a 24-hour period requiring substantially increased protection to agriculture, industry, commerce, and social activities.
In photos: Severe cold wave grips north India
...A severe Cold Wave has gripped many parts of northern India, with temperatures plummeting to -6C (21F) in Indian-administered Kashmir...
China: North-eastern city sees highest snowfall in 116 years
... The Cold Wave, which began on Sunday, caused temperatures to plummet by at least14 degrees in some parts of north-eastern China...
India cold wave: Delhi-role the coldest day in more than a century
...Delhi experienced its coldest day since at least 1901 on Monday India s capital Delhi, the coldest day for more than a century, in the middle of a severe Cold Wave across the Northern part of the country...