Water experts dismissed Trump’s claims that California water policy is to blame for dry hydrants. But Los Angeles is also unprepared for the age of urban wildfires.

As wildfires roar into residential neighborhoods, firefighters in California and elsewhere are finding that water systems can’t keep up with the demand.

Martin Adams, former general manager of the Los Angeles Department of Water and Power, blows up some right-wing myths about the water supply in Pacific Palisades, and talks with Alex Wagner about the realities of municipal water systems and ideas for adapting a system built for occasional residential fires to deal with a large scale,