Gosh, I'm glad y'all are okay. Mother Nature can throw some scary curveballs.
Even with an apology, I'd have the conversation that Luna suggested. The importance of communication in SO relationships really can't be overemphasized. He needs it explained why what he said hurts so much, to help him not make the same mistake next time he gets stressed out.
Guys are different from us, and one of the things I've had to learn is that, as much as DH loves me, he can't read my mind. I've always known that, logically, but, for example, if I'm upset that he left a lot of dishes in sink after dinner, I can't just say the kitchen would look much nicer if the dishes were done or that I'm so tired from work that I just want to sit down. If I'm upset about something (or he's upset about something) we have to talk it through to understand how the both of us feel. Then we can come up with a plan together.
Hope that helps.
