Perhaps a graphic representation, like a small pie-chart or something like that. I don't really like on-board text as it is less clear than a good graphic. But the general idea is good.
Osmos had good visual cues for relative threat; potential dangers (enemies that you could absorb, but are close to you in size and who might be able to turn the tables) have the "safe" color (blue) on the outside and the "threat" color (red) on the inside, and their degree of danger (how close in size they are to you) is represented by the ratio of the colors.
If your regions have variegated colors (like the crystal effect), you could potentially represent threat as literal color incursions: a safe region is solidly its own color; a region in jeopardy has little flecks of the threatening color in it, near the borders, that increase or decrease according to how bad the threat is.
