Arizona is renewing a focus on a drought contingency plan for the shrinking supply of Colorado River water.
The federal government has been prodding Arizona and six other Western states that rely on the river to wrap up plans by the end of the year.
In the river's lower basin, the amount of water allocated to Arizona, Nevada and California depends on Lake Mead. Shortages would be triggered if the man-made reservoir on the Arizona-Nevada border dips to 1,075 feet (328 meters) above sea level.
The U.S. Bureau of Reclamation puts that possibility at more than 50 percent in 2020.
Arizona would take the biggest hit.
Arizona water managers are meeting Thursday to talk about drought plans. Reclamation Commissioner Brenda Burman is the keynote speaker.