Mountain rescue reported on the south side of South Mountain near West Amberwood Drive & South 29th Dr in Phoenix, AZ.
Units responding, staged or on scene include: E8+ E12+ E28+ C957N C957S BC5 FRBD00 PHXP10 S8 S28.
People are stuck in a wash. Helicopter operation in use. Full Technical Rescue assignment, according to Phoenix Fire Department Regional Dispatch Center officials.