Tropical storm Hilary's rampage across Southern California causes unprecedented rainfall, leading to widespread flooding, mudslides, and landslides. Meteorologist Bill Karens joins Morning Joe to detail the havoc wreaked by the storm— the first time since 1970s anything like this happened— emphasizing the damage to roads, communities, and communication systems. As the region grapples with the aftermath, attention turns to an active hurricane season with multiple storms forming in the Atlantic, including one heading toward Texas. » Subscribe to MSNBC: on.msnbc.com/SubscribeTomsnbc Follow MSNBC Show Blogs MaddowBlog: msnbc.com/maddowblog ReidOut Blog: msnbc.com/reidoutblog MSNBC delivers breaking news, in-depth analysis of politics headlines, as well as commentary and informed perspectives. Find video clips and segments from The Rachel Maddow Show, Morning Joe, The Beat with Ari Melber, Deadline: White House, The ReidOut, All In, Last Word, 11th Hour, ...