Residents of Seffner, Florida were shocked to find that the sinkhole that had opened up in 2013 and swallowed a man sleeping in his own house had reopened for a third time. Hillsborough County officials are monitoring the sinkhole and taking steps to ensure the safety of the surrounding area, reassuring residents that none of the homes appear to be in danger. The sinkhole has been filled with sand and rock and secured with chain-link fencing each time it has reopened.