At the 2025 World Mayors Summit, C40 Cities announced three new accelerators to address climate-related issues in cities. The Cool Cities Accelerator aims to help cities prepare for extreme heat and protect residents from its deadly effects, while the Thriving Food Systems Accelerator focuses on transforming food systems for all residents. The Urban Planning Accelerator aims to drive bold climate action by placing people, planet, and prosperity at the center of urban development. These initiatives aim to create cooler, safer, fairer cities, tackle hunger, improve livelihoods, and cut greenhouse gas emissions by up to 25% by 2050. City leaders are also collaborating to decarbonize freight transport, reduce methane emissions, and accelerate climate progress through initiatives like CHAMP and the Global Mutirão, emphasizing the importance of cities in shaping the global climate agenda.