temperatures swain said surface levels in bodies of water all over california are the highest they have been in decades since the start of the mega drought due to several rounds of atmospheric rivers that walloped the west coast during the wet season its just going to fill up like a bathtub there is 221 more snowpack than average in some areas in california according to the states department of water resources be aware of your flood risks know where youre headed know where your house or your business sits within or around potential for flooding dwr officials said the big melt is here swain said the national weather service has issued a flood watch the sierra nevada mountains in california and nevada from thursday into monday in anticipation of the rapid melting as many of the reservoirs are at capacity the melting will have no where to go experts say