Is Wrath of God supposed to act underwater?

[Norfleet]

I don't think he was referring to casting it underwater, but to having it strike underwater targets.

[quantum_mechani]

I don't think he was referring to casting it underwater, but to having it strike underwater targets.

Yes.

[Taqwus]

Perhaps it involves vast schools of giant electric eels?

[tinkthank]

Sorry, I am an idiot, I thought you meant "wrathful skies", sorry.
Yes, Wrath of God will hurt underwater dwellers.
Lightning strikes the surface of the ocean and anyone swimming too close to said surface will be fried. Water is a great conducter of electricity. Um well this is a fantasy world, right?