Five steps from a problem to its solution.

Help me design and build a first working prototype for this problem in Mangan, Sikkim, India.

Problem: People downstream of Sikkim's glacial lakes can't see which lakes threaten their village or what warning they would get.
Who it hurts: Residents, workers and tourists in the river valleys below Sikkim's high-risk glacial lakes, in districts such as Mangan, Gangtok, Pakyong and Namchi.
The moment it hurts: A night of heavy rain or an earthquake in the high mountains, with no way to know whether a lake upstream is a danger or how much time there would be.
What people do today: The State studies lakes with satellites and field surveys, and early-warning sensors have been proposed; the public hears about the risk mainly through the media.
Why it is still unsolved: Hazard assessments are technical and held by government departments, the lake categories are not linked to the villages downstream, and warning systems are still being planned.
What solved looks like: A public map of Sikkim's high-hazard lakes showing each lake's risk category, the valleys and villages downstream, and the mitigation work under way, plus a subscription for official GLOF alerts by village, built only from verified government information.
Where: Mangan, Sikkim, India

First, list what you would need to learn from the people affected before building, as interview questions.
Then propose the simplest version that would help, the screens or messages it needs, and the data it would use.
Keep it cheap to run, accessible, and respectful of people's privacy. Flag anything you are unsure about instead of guessing.