Sign-up for ReadyChesCo.org, Chester County's official source for emergency events and important County services. READY ChesCo.org is used to notify you during a major crisis or emergency and delivers important emergency alerts, such as weather, health, or community alerts. You can choose to sign up by county or municipality. You can receive notifications and updates on all of your devices: email account (work, home), cell phone (voice, text, or TTY), pager, smartphone. Registration takes only a few minutes- sign up today!