The vegetation in southern California is still very stressed from the five years drought. Officials in Whittier, Calif., said they received multiple 911 calls around 4:30 p.m. PT of a fallen tree in Penn Park. Fire officials arrived shortly after with chain saws to cut people loose from the tree’s limbs. Witnesses described hearing a loud crack and seeing people run from the area. Eucalyptus was introduced from Australia to the rest of the world following the Cook expedition in 1770. The two most common hazards of eucalyptus species to people are fire and falling branches. Some species of trees drop branches unexpectedly. The weight of eucalyptus wood is high because of its density and high resin content.