They're probably all asleep still.
That is poor management then, site should be monitored 24hr/day, they should get service like serviceuptime.
I've never heard of this site before this thread, but, paying employees to be on-call 24/7 isn't cheap, even if they're not required 99.99% of the time.
Not sure how large this company is, and, if they can afford that, but, I personally understand. Give them twenty four hours, I'd say.