Does anybody know the name of this film ?

I watched it about 5 or 6 years ago so I can't really remember if this is actually what happens or not lol.

I can't remember the beginning, but a man starts seeing when people are close to danger or in trouble, and he must risk his own life to save those people. I think he see's them glowing when they are close to danger, like thermal or heat glow. I remember a scene where he is at a bridge.

That's all the information I can think of, the movie came out around 2007-2008 I think.

Thanks a lot.