The state of New-York as created a multimedia alert system, integrating Web, mobile ,voice , etc.

New York State’s ongoing commitment to provide New Yorkers with information so that they will understand the risks and threats that they may face and know how to respond accordingly.  Each of us has the responsibility to be as prepared as possible for any emergencies that may arise. 

http://www.nyalert.gov/Public/SiteText/SiteTextDisplay.aspx?text=AboutSite