Driving in floodwaters is dangerous and risky. Cars can be swept away in just a few inches of water. You can become stranded, or worse. 03 of 20 Foregoing Flood Insurance Flood losses aren't typically covered under homeowner's or renter's insurance. Problems caused by poor drainage Removing stormwater and household wastewater (sometimes called “sullage”) is an important environmental health intervention for reducing disease. Poorly drained stormwater forms stagnant pools that provide breed- ing sites for disease vectors. Because of this, some diseases are more common