For your (comfort and) safety, we recommend you keep your seat belt loosely fastened during the flight.
Reporters may enter the danger zone but unfortunately we cannot guarantee/assure their safety.
The crew of the ship were winched to safety by a rescue helicopter.
As the gunman opened fire, they all ran/dived for safety behind the trees.
Police are concerned for the safety of (= think that something bad might have happened to) the five-year-old.
He was led to a place of safety (= somewhere he would not be in danger, especially of being found and harmed).