A few things catch my attention with this...
https://www.google.ca/maps/@30.2051011,-98.3209187,838m/data=!3m1!1e3?entry=ttu
In this aerial view of the property, I count 5 bodies of water that could be classified as ‘ponds’ since the water behind the dams also apparently get called ponds. Here is a direct link to the ‘Incident Report’... https://www.documentcloud.org/documents/24439904-2401912?responsive=1&title=1?embed=true&responsive=false&sidebar=false ... and it makes the statement that “The engine crew walked to the scene due to the terrain and accessibility of the location.” So which pond is it that a Tesla can get to but a fire truck can not?
The second statement was this... “The vehicle was completely submerged underwater. The Deputies were in the water standing on what they believed was the vehicle, trying to gain access to the possible victim inside the vehicle.” This sounds to be substantially less depth than the 12 to 15 feet that was originally reported. I guess it goes without saying that the doors were locked...
“The tow truck arrived on location and was attempting to reach the vehicle with tow chains from the other bank but was unable due to distance.” None of the ponds at the link look to be that far from a bank but I guess the winches the tow trucks have aren’t that long.