Mud rain. Like all the other times dirt and water joined in the clouds and made mud rain. It’s such a natural occurrence that this mud flood thing is quite logical. There are whole mountains of dirt up in the clouds, way more than on the ground, which is why the sky looks so dirty. Gotta watch out for those mud rains. Remember all the other things that we lost to mud rain? Like an empire that was so advanced it couldn’t deal with mud. Tragic.