It is orange. What is the omen?

The sky is generally blue because there are fine dust in the air, and the light is reflected by these dust in the air, which weakens the light.

Among visible light, blue light has the shortest wavelength, the highest frequency and the least attenuation, so the sky you see is generally blue.

You see that the sky is orange-red, and there is a strange smell, indicating that there are some pollutants in the air, which makes the red part of the light appear and the air looks red.

Simply put, it is because of the reflection of light. Nothing serious. Don't worry.

This is normal and common.