According to a NASA scientist, only one year of water is left in California because of a decreasing ground water supply.

According to UC Irvine hydrologist professor and JPL water expert Jay Famiglietti, "The situation is probably worse than we all think, and we need to really tighten our belts when it comes to water and really try to use a lot less".

He said that groundwater and snowpack levels are at record low and this could lead to drought conditions. Famiglietti said that the situation is much worse than what is thought and it has to be taken seriously and people should try to use less quantity of water.

As per Famiglietti, water supply in the Sacramento and San Joaquin river basins is seen at 34 million acre-feet less than normal in 2014. It has been shown by NASA satellite imagery, he said. And if appropriate measures are not taken, it will have an effect on production of food.

He said that for the time being, water rationing will help solve this problem. Famiglietti said that those who water the grass should stop thinking about lawns, planting drought tolerant or native landscaping.

A UC Davis scientist is doubtful regarding Femiglietti's prediction. UC Davis Center for Watershed Sciences Director Jay Lund said that it's not right to think that anything like that is going to happen.

Lund analyzes the short and long term impacts of the drought on water supply in California. He said that Famiglietti's prediction is not right. According to experts, irrespective of the prediction, people should start using less quantity of water in order to ensure that the situation is under control.