The city launched ThorntonReady Alerts, which allows residents to receive alerts about severe weather, police activity and other urgent situations.

Emergency experts said the key here is the more platforms you could hear or see, the better.

Ashland is opting into the Cass County emergency alert system after concerns that warning sirens didn't go off during a tornado last summer.

Glenn County has launched a new emergency alert system called Glenn Alerts, replacing the previous CodeRED system.