Update 12 p.m.: Crews will not stabilize and level the hydrogen fluoride cars on Saturday, after all -- meaning, barring any unforeseen problems, no shelter-in-place warning will be issued, said Jody Duncan, a MetroSafe spokeswoman.
Instead, the work and shelter-in-place warning will likely happen on Sunday, she said.
Crews found more debris than anticipated upon moving other cars near the hydrogen fluoride cars, Duncan said. For safety, authorities decided to clear up the debris before addressing the hydrogen fluoride cars, she said.