About 40% of the whitehouse.gov webpage landscape, atop things, relates to the rain and flooding, this screenshot:
Readers can click the image to see coverage headings, and go to the website itself to read. It has preempted the more generic-propagandistic part of the website's "What we are doing for the nation" headlining and posting.
The main summary of federal reactions and actions, in a single item, here.
The devastation is so severe that a predominantly finance related site now has posts on the flooding worth reading here and here. (Excellent coverage.)
Beyond that, readers should do their own websearch for further coverage.