Grand Canyon trail guide says there is practically no way to warn people of dangerous flooding

First responders recovered the bodies of two people after a major flash flood swept through the Grand Canyon last weekend. Scores of visitors were rescued by helicopter and officials say one person was still unaccounted for as of Monday evening. Nina Rehfeld, a wilderness first responder and co-owner of Grand Canyon Journeys, joins CBS News to discuss. CBS News 24/7 is the premier anchored streaming news service from CBS News and Stations that is available free to everyone with access to the internet and is the destination for breaking news, live events, original reporting and storytelling, and programs from CBS News and Stations' top anchors and correspondents working locally, nationally and around the globe. It is available on more than 30 platforms across mobile, desktop and connected TVs for free, as well as CBSNews.com and Paramount+ and live in 91 countries. Subscribe to the CBS News YouTube channel:    / cbsnews   Watch CBS News 24/7: https://cbsnews.com/live/ Download the CBS News app: https://cbsnews.com/mobile/ Follow CBS News on Instagram:   / cbsnews   Like CBS News on Facebook:   / cbsnews   Follow CBS News on X:   / cbsnews   Subscribe to our newsletters: https://cbsnews.com/newsletters/ Try Paramount+ free: https://paramountplus.com/?ftag=PPM-0... For video licensing inquiries, contact: licensing@veritone.com