I can imagine the tragedy of runners and bikers collapsing due to air quality issues, that would be so much worse and what a nightmare that would be, especially with a medical provider, Kaiser being the sponsor. The liability is much worse than just cancelling the event.   My thoughts and prayers go out to the organizers and more so the people who are losing their homes from Montecito to Yorba Linda, covering all of Southern California. Very sad situation all around.