Raihan,

For sure you should look for OpenData movements and repositories.

An example for USA can be https://www.data.gov/

Best

Michal

flood.umd.edu

If your data collection is not fixed to any specific region then

for India, the data is available at the following URL:

http://www.ndma.gov.in/en/hazard-risk-response.html

National Disaster Management Authority, Government of India.