How is the flame cloud formed? Is there a scientific basis for "fire in the morning and rain in the afternoon"?

Fire clouds refer to red clouds that appear at sunrise or sunset, and the clouds on the horizon are red, like fire. This is one of the phenomena of atmospheric change.

Because the flame cloud appears in the morning or evening, it is also called sunrise or sunset.

The main reason is that in the early morning or evening with more clouds, the air layer through which sunlight passes is thicker than that at noon. Yellow, green, cyan, blue and purple rays have poor penetration and are blocked by clouds. Only red and orange light have strong penetrating power, which can protrude through the air layer and "dye" the horizon into red, forming fiery red clouds.

Burning clouds appear because the clouds are thick, so it shows that the weather is warm and hot and there is plenty of rainfall. There is a basis for "a cloud on the fire in the morning and a rain in the afternoon".