Hello,
I am eminently qualified to advise on driving thru floods..........

If you drove thru water up to the centerline of the hubs fro a few hundred yards, don't sweat it. Just change the brake/clutch fluid and check for debris stuck in the lower part of the radiator.

If, on the other hand, you had water up to the hood AND a substantial bow wave(you are trying to teach your car to swim...I have done it over the years with a BMW3.0, Volvo 240 and a W123 300D!), then replace ALL oils, clean and repack hubs front and back, replace brake/clutch fluids and hope your fuel tank cap seal was good, otherwise drain the fuel tank and replace fuel filter.
Have a good week.

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Nachi11744