Hi and welcome to just answer.
Do not attempt to start it or even turn on the ignition.
are you a member of a recovery organisation?
Hi Max .
do you have a garage to store the vehicle?
firstly you need to disconnect the battery.
then find somewhere to store the vehicle for a couple of days to allow it to dry out with dehumidifiers .
this is important .
I have known this scenario before and if you are lucky no damage will be a good result
I can continue to work with you on this for another six days until the question expires
so feel free.
If you need more help I will be pleased to assist .
thank you for using just answer and for your feedback .