# HeatSentry : Combating Urban Heat with Multi-Agent AI and Google Gemini > Source: > Published: 2026-08-28 17:09:35+00:00 ## Building HeatSentry : Multi-Agent Urban Heat Resilience with Google Gemini. *Disclaimer: I created this piece of content for the purpose of entering the Google #AllThingsAgentic Hackathon . Extreme heat is among the deadliest climate hazards facing cities. In Phoenix, asphalt temperatures frequently exceed 140°F (60°C). To tackle this, I built HeatSentry—an autonomous multi-agent command system powered by Google Gemini models and grounded in FortyGuard’s 2-meter pedestrian thermal mesh API. ## What It Does HeatSentry automates municipal heat response through 10 collaborative AI agents that monitor, negotiate, and dispatch physical interventions in real time: - **Cool Pavement Routing**: Dispatches titanium-dioxide reflective coating trucks to high-heat corridors. - **Mobile Misting Fleets**: Deploys high-pressure evaporative cooling trailers to transit hubs. - **Grid Peak Shedding**: Curtails commercial HVAC loads during thermal peaks. - **OSHA Labour Shield**: Dynamically enforces mandatory work/rest cycles for outdoor workers based on Wet-Bulb Globe Temperature (WBGT). - **Vulnerable Citizen Sentinel**: Directs emergency hydration and outreach to high-risk zones. ## Google AI & Agentic Stack - **10-Agent Negotiation Mesh**: Uses game-theoretic Nash bargaining consensus with a deterministic supervisor circuit breaker to resolve resource conflicts. - **Google Gemini 3.7 Flash**: Powers the real-time Incident Copilot via Server-Sent Events (SSE) token streaming. - **Google Gemini 3.1 Flash Audio**: Synthesizes instant 24kHz neural voice emergency alerts in English, Spanish, and Arabic. - **Google Gemma (**`gemma-2-9b-it` ): Delivers on-device field triage with sub-20ms edge response. - **SHA-256 Block Ledger**: Immutably records every dispatch decision for FEMA Category B audit compliance. ## Links [Live Application](https://ais-pre-ul2mlgbobcxgg7tkb2lkrl-305446503352.asia-southeast1.run.app) [https://ais-pre-ul2mlgbobcxgg7tkb2lkrl-305446503352.asia-southeast1.run.app](https://ais-pre-ul2mlgbobcxgg7tkb2lkrl-305446503352.asia-southeast1.run.app) #AllThingsAgenticHackathon #GoogleAI #ClimateTech #AI