The President called to get an update on the dry conditions, as 17 communities are in danger of running out of water within four months.
The White House says the President told Brown the federal government will keep working to support California's response to the drought.
The White House says the National Drought Resilience Partnership is coordinating the federal response.
The Federal Emergency Management Agency and the Agriculture Department are involved in the effort.
UPDATED: Water regulators have adopted some of the strictest water conservation rules in the state’s history as California deals with a fourth year of drought.
The city of Fresno wants its residents to take on the 20 gallon challenge: cut back on daily water usage by that much or more. And with the help of some local kids, it might just work.
If you're watering your lawn at all, there's a good chance you're watering it too much. That's the take-away from a drought workshop in Folsom for landscaping professionals.
UPDATE 12:30 p.m. -- The water conservation rate in California continues to be pretty dismal. The State Water Resources Control Board says the urban conservation rate was just 3.6 in March, up from 2.8 percent in February.
Cal Fire says four years of drought and the timing of the rains this spring have combined to make 2015 the worst fire conditions on record.