Relief drive

Hello,
I have an exerpt of a piece of news.
Could you tell me what the "relief drive" means?

...under threat from natural disasters while new rain in some areas hampered the *relief drive*.

Thanks

One meaning for "relief" in the U.S. is welfare or public assistance money paid to low-income people. But in this case I understand it to mean public assistance of another kind -- help from the Red Cross, etc.

From dictionary.com

relief -- Public assistance. Aid in time of danger, especially rescue from siege.