Johnson County E911 and the City of Iowa City E911 dispatch centers now use CodeRED Emergency Notification System which is a high speed communication telephone notification service for mass emergency notifications.
The CodeRED system gives county and city officials the ability to deliver pre-recorded emergency telephone notification/information messages to targeted areas or the entire county/city area at a rate of up to 60,000 calls per hour.
You may sign up for this free service by clicking here.