Record rainfall triggers flooding, leaves California towns cut off

Mandatory evacuation orders were announced for two dozen communities as the Russian River rose nearly a foot an hour.
1:37 | 02/28/19

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Transcript for Record rainfall triggers flooding, leaves California towns cut off
back home tonight. Weather alerts in 15 states. That system moving into the northeast. And we're also tracking a dangerous flood emergency playing out. In California, evacuations under way, the heavy rain, water up to the windows in one community and ABC's chief national correspondent Matt Gutman is on the scene tonight Reporter: That record rain triggering flooding and high water rescues. And tonight, entire California towns cut off. North of San Francisco, parts of sonoma county hammered by 20 inches of rain over the past three days. That area, totally under water. Reporter: Mandatory evacuation orders for two dozen communities with the Russian river rising nearly a foot an hour, nearly trapping us this morning. Guerneville, hacienda, all these small towns are basically islands right W. We got out just -- just in the Nick of time. Two people rescued from this mudslide near monte Rio on Tuesday. They just flew down every which way, just came running down the hill, these big trees. Russian river, David, was rising at an incredible foot and hour and will rise several more feet before a crest. And unfortunately for folks here, there is more rain forecast later this week. David? Matt Gutman with us tonight. Matt, thank you. Chief meteorologist ginger zee is tracking this emergency, the flooding and the snow pushing into the northeast. Ginger? Reporter: David, the Russian river will crest at 46 feet that's why you still see the flood warnings. Also, another storm coming in for the weekend. So, look for that on Saturday. What we have to deal with here tonight for the northeast, another snowstorm. It's a quick blast, but boss R Boston could end up with three to five inches. David? Ginger, thank you. We are also following a

This transcript has been automatically generated and may not be 100% accurate.

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