Homes remain flooded after levee break

• Story Highlights
• NEW: Searchers scour California, Colorado mountains for lost hiker, snowmobilers
  
• NEW: Storm downs 500 miles of power lines, 500 utility poles in California
  
• NEW: Part of Nevada town remains under 2 to 8 feet of water after levee breaks
  
• Forecasters predict 9 feet of snow could fall in parts of Sierra Nevada
  
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