The LA Time reported last week on the heat wave here:
Climate experts at the Jet Propulsion Laboratory in La Cañada Flintridge and the Scripps Institution of Oceanography in La Jolla cautioned Tuesday that no single event — no matter how unusual — could be directly attributed to global warming and the effects of pollution.
There is such natural variability in temperature that even a record scorcher is just one data point in a long temperature timeline.
"To call it global warming would be overdoing it," said climatologist Daniel R. Cayan of Scripps and the U.S. Geological Survey. "This is largely natural variability."