SMS contact for Honolulu: Nixle
Washington DC Emergency Communication System: AlertDC
"AlertDC is a voluntary, self-enrollment system that allows a user to register one or more devices upon which to receive alerts. In the event of an emergency, authorized Homeland Security and Emergency Management Agency (HSEMA) personnel will be able to send important, up-to-the-minute notifications and updates to cell phones or other mobile devices. AlertDC is available to residents of the District of Columbia, residents from surrounding jurisdictions, citywide stakeholders and regional visitors. Notification types may include life, safety, fire, weather, accidents involving utilities or roadways, response team activation requests, or disaster notification such as a potential terrorist attack."