Ward-level rainfall, temperature, and humidity — heavy rainfall is the earliest sign of the standing water that lets Aedes mosquitoes breed.
Aedes mosquitoes need still water to lay eggs, and eggs can hatch in under a week. A single day of heavy rainfall is often enough to fill rooftop containers, blocked drains, and low-lying ground — the exact conditions this system's satellite monitoring is built to catch. When your ward shows a "High rainfall" alert, check your own rooftop and yard for standing water within the next day or two, and read the prevention checklist for what to look for.
Don't wait for it to become a breeding site — report the exact location and a field team will be notified.
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