本轮雨雪冰冻最强时段已到来，冻雨危害不容小觑

Group 1 - The Central Meteorological Administration issued warnings for cold waves, heavy snow, and freezing weather, predicting significant temperature drops across various regions in China [1] - The temperature in southern regions is expected to decrease by 6°C to 10°C, with some areas experiencing drops of 10°C to 14°C, and localized drops exceeding 16°C [1] - The cold wave is expected to impact major provincial cities, with daytime highs around 0°C on January 21 [1] Group 2 - Freezing rain is defined as precipitation composed of supercooled water droplets that freeze upon contact with objects at temperatures below 0°C [2] - In southern China, freezing rain is also referred to as "ice rain," while in northern regions, it is known as "ground oil" or "flow ice" [2] Group 3 - Freezing rain can lead to significant hazards, with the risk of ice accumulation causing severe disruptions to transportation and damage to power infrastructure [3] - The Central Meteorological Administration highlighted that the impact of freezing rain is disproportionately severe compared to snowfall or rain, even at low volumes [3] - The current cold wave is characterized by complex precipitation states, particularly in southern regions, necessitating public caution regarding road conditions and health risks [3]