Startup Idea : App for alerting people at natural disasters

Problem: in case of a natural desasters, e.g. Tornados, floods, fires..., people are not alerted quickly enough to save their lives and belongings. Infact the local authorithues still use old channels of communicatios, which in many cases prooved ineffective. Proposed solution: develop an app that could alert in advance people on their smartphone and give immediate personalized directions and help, such as where to shelter, what to do in case of emergency, suggest to stay in a safe place, etc... Perdonalization of the information provided can be based on location of the individual and personal information set in advance. App shall integrate information from meteo services over the internet, radio, TV, local / national authorities, with the due time advance.