Buffalo had a to wait an extra day to host the Steelers after a dangerous storm that dumped more than 2 feet of snow on the region, leading the NFL to bump the game from its scheduled Sunday afternoon start.

The elements didn’t play much of a factor. Though temperatures were in the teens, the skies were clear and there was only a slight breeze blowing in off Lake Erie.

The Steelers came out flat, allowing Buffalo to score touchdowns on three of its first five possessions and build a 21-0 lead on Allen’s electrifying touchdown run midway through the second quarter.

Rudolph went 22 of 39 for 229 yards with an interception.

Allen’s 9-yard touchdown pass to Dawson Knox capped an 80-yard opening drive for the Bills.

After Buffalo linebacker Terrel Bernard recovered receiver George Pickens’ fumble at the Pittsburgh 29, Allen threw a TD pass to Dalton Kincaid on the next play.

Allen’s touchdown run came after cornerback Kaiir Elam intercepted Rudolph’s pass intended for Diontae Johnson in the end zone.

The Steelers finally capitalized on one of the Bills’ few errors of the half, when coach Sean McDermott elected to attempt a 49-yard field goal into the wind with a little more than two minutes left.

Montravius Adams blocked Tyler Bass’ low kick. The ball squirted some 20 yards into Bills territory and was recovered by Nick Herbig at Buffalo’s 33. The Steelers scored five plays later on Rudolph’s 10-yard TD pass to Johnson.

Pittsburgh eventually cut the lead to 24-17 on Rudolph’s 7-yard touchdown pass to Calvin Austin with 10:32 left.