An hourlong issue that caused problems for AT&T wireless customers wanting to contact 911 has been resolved.

The Denver Police Department tweeted around 7:30 p.m. warning people in need of emergency services should text 911.

The outage was nationwide and affected other parts of the Denver metro as well as cities like Austin, Dallas and Nashville.

AT&T tweeted just after 8:30 p.m. that service has been restored.

DPD did use this as a teachable moment to remind people they can, in fact, text 911 in an emergency.