That's an excellent question that gets to the heart of practical urban design! Yes, the vast majority of modern public trash cans are specifically designed to handle rain. You'll typically find a system of drainage holes, usually small and discreet, located at the bottom of the bin's inner liner or bucket. This is a crucial feature because, without it, a heavy downpour would quickly fill the bin with water, making it incredibly heavy for sanitation workers to empty and causing soggy trash to spill out.
The design is quite smart. The holes allow rainwater to escape directly into the ground below or into a designated drainage system, preventing the bin from becoming a stagnant, water-filled mess. This not only controls weight but also helps mitigate odors and discourages pests by reducing excess moisture. Furthermore, the materials used—like powder-coated steel or durable, UV-resistant plastics—are inherently rust-proof and waterproof, ensuring the structure itself isn't damaged by constant exposure to the elements.
However, during exceptionally intense storms, the system can be overwhelmed. If the drainage holes become clogged with sludge or small debris, or if the rain falls faster than it can drain, some water accumulation can still occur. But overall, the incorporation of drainage holes is a standard, essential feature that allows our city bins to function effectively rain or shine, keeping our public spaces cleaner.