For the first time in 193 days, no federally monitored rivers in California or Nevada are flooding or at risk of flooding, according to climate scientists. From Jan. 4 to July 15, at least one California or Nevada river fed by the Sierra Nevada was at, or above flood monitoring stage, following an historically wet winter. A non-leveed river reaches monitor stage when it rises above its normal flow for that time of year and begins to wash over low-lying banks and causes minor flooding. For a leveed river, monitor stage is when the water is several feet below the tops of the banks, but high enough where local officials are required to begin monitoring the river around the clock. Conditions only worsened in February, when 51% of the Center’s stations showed rivers were at risk of flooding or had already done so.

Source: Los Angeles Times July 18, 2017 21:11 UTC