When a series of storms and twisters hit at least 10 states in the USA at the end of February, many victims used social media channels to report their status or those of neighbors and friends. That way they could indicate their exact location to family or search parties by just a single tweet or a facebook post. The app "Foursquare" for example allows users to "check in" to specific locations. Twitter's twittermap works similarly showing users' location on Google Maps. Facebook's Places page allow geotagging on Bing Maps.