By Greg Milam, US Correspondent
While most of the United States has been gripped by the polar vortex, one part of the country is suffering a very different weather extreme.
California, the most populous state in America, is experiencing its worst drought since the 1970s.
Last year was one of the driest on record and farmers across the state are warning of devastation and rising food prices unless rain arrives soon.
Water levels in reservoirs are down to around 20% of normal levels and officials say it is only conservation efforts that have prevented a state-wide catastrophe so far.
Water levels in California reservoirs are down to 20% of normal levels The level has dropped so low at Folsom Lake reservoir in Northern California that a Gold Rush-era village, which was deliberately flooded in the 1950s, has re-emerged.
Tourists have flocked to see the foundations of Red Bank, close to an area called Mormon Island, and pick through remnants and debris scattered the now-exposed lake bed.
But the drought could have serious costs with farmers warning of rising food prices if it goes on.
The drought in California is the worst since the 1970s Paul Van Leer, who farms land adjoining the Pacific Ocean near Santa Barbara, says the irony is not lost on farmers that the rest of the country has had more than their share of wet weather.
"It is a shame we just can't pipe it down here," he told Sky News.
"I have never seen it this bad. Everyone is feeling it. We're looking out of the window wondering when it is going to come.
"We're in the heart of a rainy season right now and if we don't get it in the 30 to 45 day window, we're pretty much done."
The drought may take a major toll on farmers and food prices A third of the water for Californians comes from the snow pack in the Sierra Nevada mountains - measurements this winter have shown it to be at just 20% of the required level.
Even the state's famous vineyards have been affected. Growers have been forced to begin irrigating vines much earlier than normal, or face seeing them dying off.
Brad Goehring, who grows wine grapes in the San Joaquin Valley, said: "It is the same as real rain but it the best we can do."
Weather forecasters have little good news - there is no significant rain forecast for the weeks ahead, increasing the prospect of the drought worsening.
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