Bay City News reports that 14 people in Bernal Heights were hospitalized Sunday evening for carbon monoxide poisoning.
“The patients had some carbon monoxide in their bloodstream but a source has not been found,” according to the report.
Hélène Goupil is a former editor at Mission Local who now works independently as a videographer and editor. She's the co-author of "San Francisco: The Unknown City" (Arsenal Pulp Press).
More by Hélène Goupil
Turns out most of them did not even have Carbon Monoxide in their bloodstream afterall:
http://www.sfgate.com/bayarea/article/S-F-partygoers-cleared-of-CO-poisoning-4067370.php