A married couple who have adult children of their own are caught in the middle of a horrific storm which gives both of them supernatural power over the weather. While they have a great deal of control over meteorological events, they draw storms to themselves the closer that they get to one another, storms that they can't control. Basically, while they have this great power, they can't be near one another without severe consequences.
The reason I mentioned that they had adult children is that the one scene from this idea that popped into my mind was one of their children pointing to a storm on a weather forecast and asking if they had anything to do with it. "We can't be blamed for every bit of bad weather in the world" is the reply, but the parent intentionally doesn't make eye contact and has the wisp of a smile.