they walked from drake's bay beach 6 miles to lementour beach. when they returned they had to swim across drake's because the tide had come in. >> down to a channel that's maybe only .8 of a mile wide. so it actually picks up speed and it's very difficult because they had to swim across it at that point in time. it's very difficult to fight that and very exhausting. >> reporter: one person made it to shore alone. a surfer rescues the other two. rescue teams say if they don't find that fourth person tonight. the search effort may turn into a recovery operation. >>> governor brown asked president obama to declare a major disaster for california in the wake of last month's 6.0 napa quake. in a letter to the white house, the governor says the quake created significant damage. >>> we are getting late word tonight of a new water main break in napa. a napa resident sent this video today to ktvu. the city says it's working to repair the break near california boulevard north of downtown. napa has dozens of water pipe failures following the quake but those