How does Malcolm Lowry use imagery in Under the Volcano?

Imagery:

"A black storm breaking out of season! That was what love was like, he thought, love which came too late."

"The word was like a breaking heart, a sudden peal of stifled bells in a gale, the last syllables of one dying of thirst in the desert. Did she remember Oaxaca?"

"Nothing in the world was more terrible than an empty bottle! Unless it was an empty glass."