That's an excellent question that many city planners and public works departments are increasingly concerned about, especially with rising global temperatures. From my observations and research, the performance really varies depending on the materials used.
Traditional plastic bins, particularly those made from standard polyethylene, tend to struggle significantly when temperatures consistently exceed 100°F (38°C). I've seen instances where these bins warp, become brittle, or even partially melt in direct sunlight during heatwaves. The plastic becomes more susceptible to cracking and fading, which compromises both functionality and appearance.
Metal bins, typically stainless steel or powder-coated galvanized steel, generally fare much better structurally. However, they can become dangerously hot to touch - I've measured surface temperatures exceeding 150°F (65°C) on black metal bins in direct summer sun. This creates safety concerns for public use.
The newer composite materials and rotational-molded plastics show promising heat resistance. Many municipalities are now specifying bins with UV stabilizers and heat-resistant additives that can withstand temperatures up to 140°F (60°C) without significant degradation. Proper ventilation design also helps prevent heat buildup inside the container.
Interestingly, color choice makes a substantial difference. Dark-colored bins absorb significantly more heat than light-colored ones. I've noticed cities in hotter regions increasingly opting for light gray, beige, or white finishes to reduce thermal stress.
Regular maintenance becomes crucial in extreme heat. The combination of high temperatures and organic waste accelerates bacterial growth and odor issues. More frequent collection cycles and thorough cleaning are necessary to maintain hygiene standards.
Overall, while modern urban trash bins have improved heat tolerance, extreme conditions still pose challenges that require careful material selection, proper design features, and adapted maintenance schedules to ensure longevity and functionality.