The city is not one temperature.
A citywide forecast of 42 °C hides the lane where it is 48. HeatShield resolves heat risk to the block, three days out — and then says where to put the water.
Low → Extreme
Heat mapping is solved. Heat action isn’t.
India already knows how to draw a good heat map — SEEDS and Microsoft did it building-by-building, Ahmedabad’s Heat Action Plan has been saving lives since 2013. What no map tells a ward officer is the thing they actually have to decide on Monday morning: given four tankers and two halls, where do they go? HeatShield is built around that question.
Map the ground that does not change
Building density, vegetation cover and population from open satellite and OSM data, resolved to ~1 km cells. This is the part of the risk that is baked into the built city.
Fold in the next 72 hours
Live temperature and humidity forecasts are fused with that static layer every day, so a cell that is merely dense on a mild Tuesday becomes dangerous on a 44 °C Friday.
Say where the water goes
A coverage optimizer reads today’s surface against the hospitals and water points that already exist, and proposes the placements that protect the most people at risk.