Door won't latch shut

I have a 1996 Chevy Camaro, 184,000 miles, V6. It snowed/rained/iced the other night. At first, I could not get the drivers side door open. Key went into lock and turned, the outside handle would pull up, but the door would not come open. I poured hot water around the lock and where the door meets the body of the car. Banged a few time on the door near the lock with my hand, pulled and the door came open. Now it won't latch shut. The latch is
down and I can't get it to move. I've sprayed WD40 and de-icer everywhere in the area of the latch, holes inside the door, ect. Still won't latch shut.

Any suggestions would be appreciated.