Here is a thought. In many of your disaster movies, you have the following…

A pending disaster.
A family or couple with interpersonal issues.
An idiot who either cannot for some, as of yet, unexplained reason, or will not admit to the seriousness of the situation.
The disaster ensues, which causes the family to put aside their problems to deal with the situation at hand.

Afterwards…

The situation either resolves itself.
It is stopped before the catastrophe happens.
The catastrophe happens and the people have to deal with and or suffer the consequences of those actions and or inactions.

Always check for spelling and grammar.

Now, the way you have your log line is a bit confusing.

To which are you referring?

“When a volcanic eruption grounds all flights, a desperate racing driver must evade highway patrol officers to transport his dying fianc?’s heart transplant.”
(i. e. He is carring the container that has her new heart in it.)

or

“When a volcanic eruption grounds all flights, a desperate racing driver must evade highway patrol officers to transport his dying fianc?’s heart transplant.” operation.”