08 Prius stalling in rain.

This isn't the first time this has happened with my prius. I can't for the life of me find any answers as to why it happens. But something under the hood gets wet, my car freaks out, shuts down and I have to call for a tow, wait hours and hours for whatever got wet, to dry, and then it starts up like nothing ever happened.
I've towed my car now 4 times in the last year because of a wetness issue and stalling problems.

3 times for heavy rain and 1 for a car wash.

Does anyone have any insight as to what is causing this issue? What gets wet and shuts the car down?
Like today, it was raining heavily. I was trying to make my way to work. Stalled out on the highway, made it to an off ramp and had to have it towed home because it refused to let me put it in drive after I had stopped on the side of the road.
It's still wet and not working 2 hours later in my garage.
This is what the dash looks like.


Help?

 

To be honest I'm not even sure what a HV battery is..
I'm not the most tech savy person when it comes to the prius.

Also, battery was low because engine shut off on the highway and i used what remaining battery power I had to try and get it to the off ramp and down a ways so I wasn't stuck in the construction that was going on at the exit.

 

Yes, battery was low because the engine cut off while I was on the highway over the Missouri river. I used what battery I had left to cruise it off to the exit and down past construction so I wasn't stuck in a bad spot.

 

There are none to report.
Each time this has happened I've towed my car home and let it dry and with in a few hours it starts up just fine. No longer have red dash lights or anything on.
At this time, that photo was taken about 5 minutes after I pulled over and that was around 10am.
We got home around 11am. It is now 1:26pm for me and car is still not starting up properly.
Lights, dash, things that run off the battery start up but engine won't come on.

I'm trying to figure out what is still wet that I could try and dry off to get my car working again. Or at the very least try and figure out what is getting wet so I can try and get it fixed up so this doesn't happen again. I'm sadly not rolling in money and taking it to a dealership for me would mean a lot of out of pocket cost I can't front right this minute seeing as dealerships charge more.

 

I will go do that now, thank you.
And I will change that. I'm not even sure what plug in base means at this point.

 

Oh and She's got 196K at the moment.

 

Checked spark plugs and fuse box. Everything is pretty dry up top. I'm just going to try and wait it out for the next couple hours and see if things dry off enough again.
Thank you for the help. I do appreciate it.

 

I did that as well before I posted here. Google was hinting it might have something to do with the air flow sensor so I went and checked that and the filter. Both dry and ok as far as I can tell.

 

I was thinking about that. I'm at 2 bars for gas. Might later this afternoon if it's still not starting, try and get some gas with my gas can and see if that helps. I know battery wise though it was 1 bar from full before it stalled. Usually if it gets this low (I think it's called a battery dump? I'm not sure).. the engine will kick in and it'll be back to green and almost full 5 minutes down the road.
Issue right now is, engine won't turn on.
The car on the underside is still pretty wet. I'll come back and update in a few hours if anything changes.