My boyfriend's phone off has been off all day yesterday since morning an now I haven't heard from him since long but help

I was very calm about it yesterday wasn't really worried at all thought I would get a response from him today nothing. It hasn't been 48 hours but I'm just trying to keep calm an not worry. I know how he is he won't have his phone off for that long and he lives by himself, his family doesn't stay near him, and none of his friends live in the same neighborhood as him. He stays in San Bernardino where there are shootings like every single damn day in that city. There was just a shooting there near his area just 2 days ago and now I keep telling him you better be be careful. I remember he told me a story some guy in his apartment complex thought he had a problem with him an said he was going to jump him or whatever an my boyfriend now carries a knife around with him now 😒 my car isn't working at the moment so I just can't go over there and we live like 45 minutes away I'm trying so hard to not let this bother me and not have my dumbass jump to conclusions some of you may think I'm over reacting but he lives in a dangerous city, and I love him so much and no he's not cheating at all. If I don't hear from him at all today what do I do?