WASHINGTON: The National Oceanic and Atmospheric Administration and other federal agencies are relying heavily on social media as they give the public information about Hurricane Sandy.

The federal agencies are using Facebook and Twitter  to get their safety messages to large audiences quickly, said Chris Vaccaro, director of NOAA communications and external affairs at the National Weather Service.

“It allows people to be a force of nature in and of themselves by further amplifying the forecast and safety information,” he ...