CodeRED Emergency Notification System

Sioux City residents can receive emergency notifications through CodeRED, an emergency management platform that delivers geo-targeted alerts across different channels, including telephones, text message, email, social media, mobile apps and any communication device.

The City of Sioux City will utilize the CodeRED platform to send alerts related to snow emergencies, boil water warnings and water main breaks to communicate critical information with our citizens.

HOW TO SIGN UP:
To sign up for the CodeRED by Crisis 24, text ALERTSIOUX CITY to 24639 and a link will be shared to enroll. 

NOVEMBER  28, 2025 UPDATE:  There was a recent cybersecurity incident involving the legacy CodeRED emergency notification system, operated by our third-party provider, OnSolve. This incident did not affect any City systems. If residents previously subscribed to CodeRED and used the same password for other accounts (email, banking, shopping, or business systems), the City strongly urges you to change those passwords immediately. 

The new CodeRED by Crisis24 system is now in use.  

For assistance with CodeRED by Crisis24:
24/7 Support Line: 866-939-0911
Email: crsupport@crisis24.com

CodeRED Mobile Alert App

The CodeRED Mobile Alert app is available for Sioux City residents to receive emergency alerts about snow emergencies, boil water warnings and water main breaks on-the-go. By downloading the app, residents will be able to receive critical, location-specific CodeRED alerts directly on their smartphone.

Instructions on how to Text to Enroll will be made available soon.

 *** A separate sign up is required for desktop and mobile.

Caller ID

You will recognize the CodeRED call when your caller ID displays the following numbers. Please be sure to add these telephone numbers into your telephone's contacts, when applicable. 

866-419-5000 or Emergency Alert for Emergency Notifications
855-969-4636 or Community Alert for General Notifications

Contact Customer Support

Not finding how to change how you receive your notifications? Or have you moved and don't want to receive them? Contact CodeRED Customer Support by calling 866-939-0911.