As data centers proliferate to power the AI revolution, their immense electricity consumption and cooling needs are creating significant strain on local grids and the environment. DataCenterGuard offers a comprehensive solution for communities and municipalities to push back against the unchecked expansion of data centers. We provide a toolkit and consulting services that empower local stakeholders with data-driven insights into the environmental and economic impacts of proposed data centers. This includes analyzing energy scarcity, water usage, and potential for renewable energy integration and thermal energy storage solutions. Our platform helps communities negotiate better terms, advocate for sustainable practices, and ensure that data center development aligns with local climate goals and infrastructure capacity.