The images above are screen shots from the videos below, which were shot at Santa Fe Dam on Thursday. In addition to being the Incident Command Post for the Colby Fire at Glendora, California, east of Los Angeles, it has been the scooping point for the two CL-415 water-scooping air tankers working the fire. Los Angeles County Fire Department has been contracting for scoopers every fall for many years. In 2013 the contract was scheduled to end in December, but because of the drought and very dry fuel moistures the County extended the contract.
Being directly below the aircraft just after they lifted off the lake with full loads was not the safest place to be. Probably the pilots were wishing the folks with the cell phones were not there.
Below is one more screen shot from one of the videos.