Not really what I expected.
Even though George Brent gets third billing, he has the biggest part in the movie. Tyrone Power really doesn't have much to do.
The catastrophe has great special effects, but it comes so unexpectedly in the middle of the movie that its onset is almost funny.
In some ways, this movie seemed like a prototype for "Casablanca." Brent is an exile from his own country who finds the great love of his life just happening to walk in on him. Meanwhile, someone is called on to sacrifice their own happiness so a great man can have a chance to be a great man.
These comparisons with "Casablanca" don't work to the benefit of "The Rains Came."
"The Last Days of Pompeii" is the best Thirties disaster movie I've seen. This is above "In Old Chicago," but having the catastrophe in the middle of the film hurts it.