California sees driest spring in decades as data says drought to deepen

California is experiencing one of the driest starts to spring in decades, data showed Friday, and absent a heavy dose of April and May showers the state's drought will deepen and that could lead to stricter rules on water use and another devastating wildfire season.

New readings showed the water in California's mountain snowpack sat at 39per cent of average. That's the lowest mark since the end of the last drought in 2015 and only the third time since 1988 that it's been that low.

About a third of California's water supply comes from the snow as it melts and trickles into rivers and reservoirs. April 1 is when the snowpack typically is at its peak and the date is used as a benchmark to predict the state's water supply in the drier, hotter spring and summer months.

There's about 11 inches (28 centimeters) worth of water sitting in snow in the Sierra Nevada along California's eastern edge, according to the state Department of Water Resources. It's the lowest reading since the depth of the last drought seven years ago, when California ended winter with just 5per cent of the normal water levels in the mountains.

The numbers mark a disappointing end to California's winter, which began with heavy December storms that put the snowpack at 160per cent of the average. But there has been little precipitation since Jan. 1.

A storm that brought significant rain and snow to parts of the state earlier this week did little to change the course of the drought. And warmer than usual temperatures have led to the snow melting and evaporating faster than normal, state officials said.

Nearly all of California and much of the U.S. West is in severe to extreme drought, according to the U.S. Drought Monitor. Last July, California Gov. Gavin Newsom asked people to cut their water use by 15per cent compared to 2020 levels but so far consumption is down just 6per cent.

The persistence of the drought has prompted state officials to call on cities and other local water suppliers to step up their conservation plans. Local governments may act by further restricting when people can water their lawns and wash cars, limit the use of water for decorative or ornamental purposes and step up enforcement against people who let sprinklers run onto sidewalks or engage in other wasteful behavior.