There's a good chance that those guys didn't even have their phones on. If something is that urgent you don't text, you call, and if the call doesn't go through you find someone else that you can call who can go to the people involved and so on until you have guaranteed timely delivery and if you can't achieve that then you're going to have to live with the consequences.
Doing a 'fire-and-forget' text message and then attaching grave consequences to the timing is ridiculous.
Doing a 'fire-and-forget' text message and then attaching grave consequences to the timing is ridiculous.