Copy and paste clouds into our artwork.
switch to Eraser tool (E). select very large soft brush, and erase edges of clouds layer, so that clouds start to actually look like clouds.
Open Hue/Saturation window again (Ctrl-U). set lightness to -40 .. -50, saturation to 80..90. Then play with Hue to get vivid red clouds.

Repeat all steps to create another layer with clouds (only, do not make them red this time)
Then add another layer with clouds, and another one :-) That's all! Thanks for reading!

Preview