challenges. laura anthony is live at fanny bridge in tahoe city. laura? >> reporter: well, hi. we're here at the dam at tahoe city. this is the only outflow from lake tahoe. and thanks to record inflows this year, the lake has gone up nearly six feet since last october. that's the highest single-year increase ever. it's everywhere you look at lake tahoe. water, that is. the lake is now well above its natural rim for the first time in years and still going up. the comparison to last year is stunning. this is what it looked like on the south shore at regan beach last year. here is the exact same scene this year. >> it's phenomenal the difference. it is remarkable. we have such a long winter and so much precipitation. as it was coming down, we knew it was going to be a great summer. >> reporter: and now with all the water flowing through the dam at tahoe city and heading down the truckee river towards