The police were there to reassure the audience that it was being protected; the rotataing red light was like a campfire in the wild, warning what's out there to stay away.

老师这是我教材上的一句话，我不明白为什么warning what's out there to stay away的意思为什么不是“警示人们去远离那里的什么东西”而是“警告四周存在的威胁不要靠近”，to stay away是什么成分？