The scope of the winter storm has been nearly unprecedented, stretching from the Great Lakes near Canada to the Rio Grande along the border with Mexico. About 60% of the U.S. population faced some sort of winter weather advisory or warning, and temperatures plummeted drastically below normal from east of the Rocky Mountains to the Appalachians.

Travelers’ weather woes are likely to continue, with hundreds of flight cancellations already and more expected after a bomb cyclone — when atmospheric pressure drops very quickly in a strong storm — developed near the Great Lakes, stirring up blizzard conditions, including heavy winds and snow. Some 1,707 domestic and international flights were canceled on Sunday as of about 2 p.m.

The Buffalo Niagara International Airport will remain closed through Wednesday at 11 a.m. Buffalo Niagara International Airport plays an essential role in the development of business and tourism in the Buffalo Niagara region. Buffalo Niagara International Airport has up to 100 nonstop flights per day serving 31 airport destinations and beyond. Meanwhile, the Niagara Falls International Airport reopened Sunday night.

Severe weather will also likely trigger flight delays and cancellations at airports across the affected region, including but not limited to San Francisco International Airport.

Localized business disruptions may occur in flood- or tornado-hit areas; some businesses might not operate at full capacity because of damage to facilities, possible evacuations, and some employees’ inability to reach work sites. Monitor local media for updated emergency and weather information. Confirm flights. Charge battery-powered devices in the case of prolonged electricity outages.