During the later parts of the afternoon, on a searing and clammy day, you could look upward and be sufficiently blessed to catch a sight of shining clouds that sparkle with rainbow colors. This is rare phenomenon that occurs on sunlight diffracting off homogeneously sized droplets of water present in the air.
Also referred to as “fire rainbows” / “rainbow clouds,” this rather unusual event is most frequently observed in cirrocumulus, altocumulus, lenticular and cirrus clouds. This is a phenomenon that’s been documented across the earth. This post has a number of unusual instances of this gorgeous natural occurrence. via mymodernmet