At work I sent out an email needing an update on something. It wasn't super urgent and I sent it at maybe 9 am. He emailed me back about 3 pm and the first line if the email was “I am sorry for the delay in getting this answer to you. My daughter was in surgery this morning.”
What are you going at work? Why are you here? Your child was in surgery and so I assume your family needs you. Take a day. FFS