Water can definitely cause electrical issues.
Just a click can be so many things.
Low battery voltage.
Loose dirty battery cables, check both end of the positive and negative.
Bad slave soleniod, located on top of the engine near circuit breaker.
Bad starter soleniod
Use a volt meter to verify voltage is not dropping when cranking.
1997 2400 SCR
5.7 Vortec / Bravo 2