wiredmikey writes "Twitter on Wednesday launched a system for emergency alerts which can help spread critical information when other lines of communication are down. Twitter Alerts are designed to help communicate in natural disasters or other emergencies when traditional channels may be overloaded or unavailable. 'We know from our users how important it is to be able to receive reliable information during these times,' Twitter product manager Gaby Pena said in a blog post. Users who sign up to receive an account's Twitter Alerts will receive a notification directly to their phone for tweets marked as alerts from certain senders. Some of those able to send alerts include the American Red Cross, Federal Emergency Management Agency, World Health Organization, and government and non-government agencies in Japan and South Korea."