The first thing we tend to do is to tell about an event representing the exact moment when that event occurred. But you don’t have to necessarily depict the climax as a present moment. You can tell about something happened in another temporal line, different from that of your actual piece, in order to make it more interesting. So you can:
Represent the moment before the climax.
I’m talking about a moment of very high tension, after which something important is going to happen: an archer with the bow stretched to the maximum, ready to shoot his arrow; a dragon with its mouth wide open, with a strong light visible from the inside, a prelude to a violent blaze; an aircraft that rises from the ground, with the propellers loaded, ready to speed into the skies.
In this piece below, the strong storytelling is made by a lot of elements: the clothes of the guy in the background, from which we can speculate he is a sovereign, maybe an anarch, the tubular structure over him, the contrast between the strong light and the shadow, where the girl is hiding, and finally the girl’s pose, suggesting her aim and her next action.