。
She's in danger right now.
Literal
She [topic-は] now danger [in-に] has-fallen.
陥る (おちいる) is a literary verb meaning 'fall into (a bad situation)' — a step up in formality from the everyday 落ちる. It takes に for the situation fallen into: 危険に陥る ('fall into danger'), 罠に陥る ('fall into a trap'), パニックに陥る ('fall into panic'). 陥 carries the older meaning of pits and traps in classical Chinese, and the verb retains that gravity in modern Japanese — choose 陥る over 落ちる when the fall is metaphorical and serious.