I hope for a speedy and full recovery of our Canadian brothers. But, I also hope that this doesn't just turn out to be a case of them being safe-ish. We shall wait and see for the findings.
Very intriguing indeed. Read the attached URLS. Initial indications there was no flammable products present; some suggestion about methane from an abandoned well. Strange.
What a horrendous thing to have happen. Hope the severely injured FF has a full recovery! Hopefully, they will find the cause; Methane sounds like the most plausible of theories at this point.