Government Periodicals Universe (1988+)
TRAIL: Technical Report and archive and image library. (1940-1975)
"Use ‘ProjectAlert’ to keep up with USGS scientists as they respond to floods, droughts, and chemical spills. These alerts are official, yet informal notices that describe flood, drought, or water quality conditions across the country, as well as how USGS field crews are responding to the event."
One may sign up for alerts here: http://www.usgs.gov/newsroom/article.asp?ID=3406#.UGFMmUjB69U at the Media Advisory homepage.