I’m Making An App That Predicts Where A Flood Will Show And Tell User What They Will Experience If They Travel Here

To clarify this app will be on three rural village going to a main town, do I need to request data from my country’s official weather agency for flood data to receive the necessary information I need to build this app so it will have a precise outcome?

This is a project for my grade 12 subject, I had this idea and me and my group members will build this.

I’ve been doing some research for the necessary data of the three town we picked. But I can’t find anything.