I asked over in R_A but want your advice as well: My Boyfriend's Dad passed away very suddenly last night - how can I best help BF through this time?

My boyfriend's Dad (the only parent with whom he was close) died very suddenly (unknown cause at this point) last night. He lives in the Southern US and we live up North so there was no hospital closure at all. As expected, he is a complete mess, and I want to help him during this time. Any advice you have would be very much appreciated.