Storm/Sewage build up
Crawl Spaces are notorious for collecting water and trash. It is important to check your crawl spaces with a flash light once a month. You should check for weak points or places that wild animals can enter. Wild animals can and will force their way inside your crawl spaces and make a home. They will also get trapped and die stinking up your home with a TERRIBLE odor. If you do not have screens on your crawl space entrance trash and debris will make it's way inside. As you can see in the pictures, after a storm water and everything floating in it will collect under your home.