Hey Two Thirds explain to norraad what 1,000 pounds of hydrazine would do a community...
Hydrazine is extraordinarily toxic.
Remember when the shuttle landed way back when, and they set up big fans to blow on it while it sat on the runway?
IIRC, that was due to the fear of lingering hydrazine vapors from the thrusters.
Well, Dog, I talked to a couple of my associate propulsion engineers, as I am a structural analyst and they are the ones that work with the hydrazine and design the propulsion system and neither one of them was willing to put a number on, say the TNT equivalent of 1000 lb of hydrazine. They did point out something that I hadn’t even thought of and that is the likelihood that the entire mass of hydrazine was probably a solid frozen block (freezes at about the same temp as H2O) since the heaters were probably not powered, depending on how the Sun was hitting it. My guess is that it would probably never made it as one liquid mass, but probably, at worst for us, would have been some sort of vapor by the time it got down, and if it blanketed a community, it would have been devastating because of the toxicity.