With intensely hot rays, the sun shines brightly. Many mirages appear in salty/arid places.

This couplet paints a vivid picture of a common sight in deserts. It says that under the blazing sun, when its rays are intensely hot, you'll often see a mirage, especially in barren or salty lands. Think of it like seeing a fake pool of water shimmer in the distance on a hot road, only to realize it's just an illusion created by the intense heat bending light. It beautifully captures how our eyes can deceive us in extreme conditions, making us perceive something that isn't actually there, much like a thirsty deer might chase a non-existent water source.