2003 SAAB 9-3 repair Question Water Flooding

I want to start by commending your video on changing the breaks - it worked like a charm and saved my wife and I hundreds.

My current issue is from driving home during flash flooding. I couldn't tell the depth of a puddle and suddenly the engine quit. I would guess possibly 12 inches (basically high enough to not open the door). I pushed it out and back home. It sat for the night. The engine has not started since.

I think the battery is coincidentally going bad, but we have been draining the charge and periodically needing to bring it in to charge it (is there anything flood damage can do that can cause a short that will drain a sitting battery?). With a fully charged battery we can hear it trying to turn but just not firing. Once the battery drains we hear clicks.

I pulled out the air filter which was soaked and covered in leaves and debris. We cleaned the air filter area and put the filter in front of a fan to dry it out.

We parked the car on a slant with the front end elevated and water began trickling from the tailpipe. When we tried starting it, leaves and debris blew out the tailpipe and water began pouring. It didn't fire, but when we tried it a few more times we would get a steady water flow each time. The water drippage has ceased and now the starter just turns it over - but still doesn't fire.

My next step it to check out the spark plugs and coils, but I haven't tried it on a foreign car and I am afraid of what odd-ball tools Saab has strategically used to deter people from doing their own auto repair.

Do you have any recommendations?

Thanks,
Nathan