I'm quoting this as I can't find the original note about some severe weather in Austin.
It is worth noting that much of this structural steel work is rather impervious to cold weather. While the factory is only currently partially enclosed, I doubt we will see much, if any delay. Some of the work will likely slow and I highly doubt any of the equipment is rated for cold weather use, but consider a few things;
1. Portable heaters/tarps can be trucked to the site in a matter of hours and entire portions of the factory could be walled off and maintained at a certain temperature.
2. All they have to do is keep the equipment running (Sorry, Environment) to prevent anything from freezing up overnight as far as anything that requires the use of a diesel engine to move or lift something.
Cold weather work is nothing special. The official "shutdown" temperature for some sites I've been on in northern Alberta is -40C/-40F. Anything above that, we're building the widget*. It takes some planning of course, but it basically involves some form of the two listed items above. Concrete can and is regularly poured in negative temps, steel, as I mentioned earlier is largely impervious. Very cold or hot temps may impact the ability to establish bolted connections, but this is more problematic for say a, long span bridge connection, and not this simple work.
I'm honestly not worried about Austin slowing down. I'm sure the contractor is sufficiently motivated through damages clauses to figure out how to hold the schedule and will employ any tool or technique they can to deal with a short term chill. I realize the infrastructure in Texas is not the same as Alberta, but Construction in general is good at mobilizing resources quickly.
*Some processes that involve water typically shut down at sustained temps below 0C, but that is more related to road building, not building building.
