I was riding home tonight and I sorta heard some noise but couldnt make it out since I was in traffic.

Got home and wheeled my bike in the hallway of my apartment complex and I heard some noise so I flipped the bike over and I think it was the disc brakes.... both front and back brakes. Sounded like they were rubbing but both of them?

Could it be road grit? It was raining and wet when I rode home. Could road grit get into the disc brakes?

You should be able to see the gap on either side of the disc.
[obviously text is blind]
gap? yes/no
Mechanical caliper can get stuff in the mech, hydraulic cannot
Same seal around the piston works both ways.

I think the road grit makes the problem audible, that's all (at least in my experience). Sounds like they need a good rinsing and adjustment.

I would agree with berg! The bike sat for a few days and then I was playing with it. I think it was the road grit.