International architecture competitions can significantly impact local communities, both positively and negatively. On the positive side, they can bring global attention to local issues and opportunities, attract investment, and inspire innovative solutions to community challenges. Winning designs often incorporate local culture, materials, and needs, leading to unique, context-sensitive architecture that can enhance community identity and pride. 

However, there can also be negative impacts if the projects are not well integrated into the local context or if they prioritize aesthetics over functionality and sustainability. There's a risk of creating structures that are out of scale or out of character with the surrounding area, leading to potential social and environmental issues. 

It's crucial for competitions and subsequent projects to engage with local communities and stakeholders to ensure that the outcomes benefit the residents and the broader environment.