Were is my cat?

Hi,

I am a bit scared today, because my little cat has been out since last evening and we have no idea were he is. Normally is comes in before it gets dark, and when we call him it takes him only 5 seconds to come. But not last night. And even if we let him out first thing in the morning he would never miss breakfast. So my mind is going in all directions wondering were he can be. We have been looking outside, even took a look at the roadside a bit away from here to be sure he hadn't been run over... This really sucks!