Rhetorical Device Identification

(1) The storm had been approaching for hours, creeping in on a belly of thunder. (2) Now, as the sky cracked open, sheets of water poured down, pounding the roof like an angry mob. (3) Inside, she pressed her face to the glass, eyes wide, heart thudding like the hail against the window.

Which of the following rhetorical devices is most prominently used in sentence 2?