LAS VEGAS (AP) — Drought in the southwestern U.S is depleting the vast Lake Mead on the Colorado River to levels not seen since Hoover Dam was completed and the reservoir was filled in the 1930s.

U.S. Bureau of Reclamation officials in Nevada said Tuesday the water level at the reservoir serving Las Vegas, Phoenix and Los Angeles will drop this week and should be about 1,080 feet (329 meters) above sea level by November.

The lake level is currently a little under 1,082 feet (330 meters), and it's about 39 percent full.

Bureau regional chief Terry Fulp says water deliveries will be met this year and next year to cities, states, farms and Indian tribes.