water levels in its two biggest reservoirs, lake mead and lake powell, they've been dropping fast. shortages are coming. so what does that mean for you? >> the cost of water's going up. it's becoming more expensive because there's increasing competition for water, and there's a lot of components that go into the cost of water. for example, it takes a lot of power to move water. and so if power costs go up, water costs go up. >> water is a valuable commodity. it's undervalued. it's underpriced. the more people come here, as the drought that we've been experiencing continues, it is going to become more expensive. >> arizona's ahead of its neighbors in terms of planning for the future and ensuring that water use is considered when building homes. developers, home builders can't just build wherever. they have to follow certain rules. >> you have to go to the arizona department of water resources and demonstrate that you have sufficient water supplies for 100 years. in order to be able to sell a new house, you have to demonstrate that you've got this water supply. >> they are also stock

authorities tried to talk powell into that surrendering peacefully but he shot himself last night and died. >> a seventh home near a massive sinkhole in land oh lakesas been condemned. county officials add the sinkhole has grown by another 30 feet. it first opened up back on july 14th. crews are trying to stabilize the hole with limestone and dirt. they believe some of their equipment may have caused the additional collapse but they no longer believe this is an active sinkhole. >> ♪ >> in today's tech bytes, could robots soon be flying your plane? >> ubs released a report saying that remotely controlled airliners could be taking off within eight years. >> but passengers aren't on board yet with that idea only about one in five people surveyed said they would take a pilotless flight. >> t-mobile is introducing a new 55 plus plan. >> offering seniors two lines for only 60 bucks a month. unlike other carriers this is a full-fledged smartphone plan with unlimited data. >> apple is on instagram. showing offer photos shot on iphones by us. >> apple curators will look for the #shot on iphone and ask the creator for permission to share them. your photo cou