What potential impact do cold waves have, especially when accompanied by heavy snowfall and extreme cold?

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AThey lead to increased tourism.

BThey can immobilize an entire region.

CThey cause immediate heat-related illnesses.

DThey improve air quality significantly.

Answer:

When a cold wave hits, especially with heavy snowfall and extreme cold, its potential impact is to immobilize an entire region. This means transportation grinds to a halt, essential services can be disrupted (like power and water due to freezing infrastructure), and daily life effectively ceases, posing significant challenges for health, safety, and supply chains.

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