"We apologize for the inconvenience", Wells Fargo told Newsweek.
The issue started to become apparent in the early hours before spiking at around 8 a.m. (ET); by noon, the banking service still wasn't back to full operations.
This is the second time this month Wells Fargo customers have experienced issues.More news: Six Nations 2019: Ireland's Devin Toner and Garry Ringrose miss Scotland
The company acknowledged on Twitter it is researching problems with online banking and its mobile app.
The issues are the direct outcome "of a fire at a server farm located in Shoreview, Minnesota". When the fire department got there, though, they found no evidence of a blaze. If there are any backup or redundant systems, they're not working.More news: Labor puts politics ahead of policy in responding to banking Royal Commission
It is unknown how many Wells Fargo customers were impacted. As a result of the fire the servers had to be shut down, the bank employee reportedly said. It is baffling that a single incident has set off such a chain reaction that it knocked out the entire internet-facing infrastructure of the bank.
The outage affected Wells Fargo customers all around the USA, with all of the coastal areas experiencing the heaviest issues.More news: Why Stephen A. Smith Believes Patriots’ Rob Gronkowski Should Retire