A nationwide cyberattack against the OnSolve CodeRED emergency notifications system has prompted cities and counties across the US to warn residents and advise them to change their passwords. CodeRED is used by local governments to deliver fast, targeted alerts during severe weather, evacuations, missing persons, and other urgent events. Both the data breach and the service outage have serious implications for communities. The OnSolve CodeRED system is a cloud-based platform used by city, county, and state agencies to send emergency alerts via voice calls, SMS, email, mobile app notifications, and national alerting systems. Because of the incident, some regions temporarily lost access to the system and had to rely on social media or other methods to reach the public. To avoid confusion:…