Five steps from a problem to its solution.

Help me design and build a first working prototype for this problem in Chennai, Tamil Nadu, India.

Problem: Residents of flood-prone south Chennai can't see whether drain work on their street is finished, or which relief centre is ready for them, before the monsoon arrives.
Who it hurts: Households in low-lying localities of Sholinganallur, Perungudi and Madipakkam that flood in most heavy rains.
The moment it hurts: The days before the Northeast monsoon, deciding whether to move the car, stock up or leave, and the night water enters the house.
What people do today: Residents' associations write representations and wait for replies; progress on drains and relief centres is announced in review meetings and reaches residents through news reports.
Why it is still unsolved: Drains, lake surplus channels and relief centres sit with different departments, and their status is not published street by street, so residents can't tell what has been fixed near them.
What solved looks like: A public monsoon map for south Chennai showing each relief centre with its facilities and opening status, drain stretches marked done or under way, and residents' requests for desilting or inspection with the date raised and any reply, in Tamil and English.
Where: Chennai, Tamil Nadu, 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.