What is the sign that the sky turns yellow?

1. The yellow sky is generally a precursor of heavy rain, which is normal for natural phenomena such as wind, rain and lightning, and will not be a precursor of an earthquake.

2. The sky turns yellow, which is the effect of mirror and spherical plane reflection such as refraction, reflection and scattering of rain.

3. Rainwater turns yellow, which may be affected by the local air quality. As we all know, clouds are actually not as clean as they look. They are composed of dust and small water droplets. There are still a lot of dust and small water droplets in the air under the clouds, but it is not enough for human eyes. When precipitation forms, after neutralizing these dust souls, the color of the falling rain will be affected by the local soil, including yellow, red and black.

4. The sky and rain turn yellow, which may be a rare natural phenomenon that sandstorms are accompanied by rainfall.

5. In addition, there may be "acid rain" and other natural disasters caused by atmospheric hazards.