Lost in the profoundly unhelpful debate between "no one has heard of this" and "well I have" are the actual conditions in the community and whether the concentrations of either the initially released compound or the byproducts of the "controlled burn" are high enough to cause effects in humans. From the EPA link:
> Feb. 13, 2023 Update
Re-Entry air screenings are underway. Community air monitoring will continue operating 24 hours a day. As of yesterday evening, 291 homes have been screened. To date, no detections of vinyl chloride or hydrogen chloride were identified for the completed screened homes. There are 181 homes that remain to be screened.
Good news, to be sure, though this is only the very beginning of the process.
So the government investigates a big disaster caused in part by their actions and everything is within normal levels. A lot of time the same regulators will say the water is fine when brown stuff is coming out of the faucet.
https://response.epa.gov/site/site_profile.aspx?site_id=1593... ("East Palestine Train Derailment")