Sun roof was open a little bit during a rainstorm... water came in. Replaced battery and now my hazard lights won't turn off even when the car is. I unplugged the hazard light switch for now. This video suggests that there may be water somewhere, but I can't find in my Accord the locations the guy in the video is looking at:
Anyone have any suggestions?

 

It may be an issue with the hazard switch shorted.

On cars, hazards can be turned on if the car is turned off, by pressing the hazard switch. Your hazard switch may have shorted.