The Los Angeles area is preparing for the tail end of an atmospheric river that will bring "beneficial rain," forecasters say.

The incoming rain has sparked concerns about toxic debris in the burn scar areas. Tom Wait and Nicole Comstock report.

After the region was devastated by three massive wildfires last month – the Palisades, Hughes and Eaton fires – crews prepared for potential debris flow in burn scar areas.

The heaviest rainfall is expected from late Tuesday into early Wednesday, with a slight risk of moderate debris flows in areas impacted by recent fires.