Freezing rain occurs when rain falls through a layer of cold air near the ground, causing it to freeze upon contact with surfaces like roads, trees, and power lines. This results in a thin layer of ice that can create hazardous conditions for travel and can lead to power outages due to ice accumulation on electrical lines. The formation of freezing rain typically happens when warm air rises over a cold front, creating a temperature inversion. This weather phenomenon is often associated with winter storms and can be dangerous, as it reduces traction for vehicles and increases the risk of accidents, making it important for people to stay informed about weather conditions during such events.