The Town of Charlestown manages all evacuations. Here is a link to their site. http://www.charlestownri.org Click the tab for Emergency Services & Charlestown Emergency Agency.
Charlestown has an automated community notification system called Code Red to announce all emergencies and the procedures in place. To add your phone number to their calling list follow this link http://www.charlestownri.org Click on the link for Code Red on their Home page.