A shout urging someone to flee from danger; the imperative/request form of the verb 'to run away' (nigeru).
地震だ、落ち着いてからじゃなくて今すぐ逃げて！
Earthquake! Don't wait to calm down, get out now—run!
燃え始めた建物から、消防士が大声で『逃げて！』と叫んだ。
From the burning building, a firefighter shouted loudly, 'Run!'
ゾンビ映画の上映中、観客が画面に向かって『逃げて！』と叫んだ。
During the zombie movie screening, an audience member shouted 'Run!' at the screen.