U.S. postal carriers will deliver through snow, rain, heat and gloom. But a polar vortex?

Nah.

The U.S. Postal Service is suspending mail delivery Wednesday in several states, including around the Cleveland area, because of dangerously cold conditions and concerns for the safety of its employees.

"Some places could see wind chill readings as low as 60 below zero," the Postal Service said in a post on its website.

Delivery is suspended in the following 3-digit ZIP codes:

• Northern Ohio (Cleveland and Lima areas): 441, 458

• Ohio Valley (Cincinnati and Columbus areas): 452, 430-432

• Michigan: 486-491, 493-499

• Indiana: 460-469, 472-475, 478, 479

• Chicago: 606-608

• Lakeland: 530-532, 534, 535, 537-539, 541-545, 549, 600, 602, 601, 611

• Detroit: 480-485, 492

• Central Illinois: 601, 603 - 605, 609, 613, 614, 616, 617

• Western Pennsylvania: (Erie and Bradford areas): 165, 169-177, 188

• Northland: 540, 546-548, 550, 551, 553-564, 566

• Hawkeye: 500-514, 520-528, 612

• Dakotas: 580-588, 570-577

• Eastern Nebraska: 680-689