The United States and Mexico have signed an agreement outlining specific steps and a new timetable to clean up the ...

In recent years, "atmospheric river" has become used much more frequently in scientific papers and in media coverage. According to experts who study climate and weather, a few reasons may explain why.

American Rivers ranks the Tijuana River No. 2 on its list of most endangered rivers. Advocates are urging the U.S. and Mexico to address the flow of raw sewage.