November 27, 2014
LAS VEGAS (AP) - City officials say a massive mound of foam that gurgled from storm drains after flooding in a northwest Las Vegas neighborhood was caused by fire retardant in the drainage system.
KSNV-TV reports that residents in the area near North El Capitan Way and Ackerman Avenue reported the milky foam began forming Monday morning.
By evening the foam mound was a 40 feet wide and 4 feet high.
The area is near where intersections flooded following mountain thunderstorms on Sunday.
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