Is Havok really dead?

Havok must have thought that he had a chance against Apocalypse and his horsemen – he actually blows up the entire X-Mansion. And, if it weren’t for Quicksilver, he would surely kill everyone in the house. As far as I see it, his presence in X-Men: Apocalypse has no impact at all (since the house could have been destroyed by other means).
This being said, I’m uncertain that he died. It isn’t specified in the movie – it’s just said that he’s the closest to the explosion. Why is this not made a bit more explicit in X-Men: Apocalypse? It would give Cyclops all the more reasons to fight harder.
I guess that I’m more inclined to believe that he hasn’t died, and that, somehow, he’ll return in future X-Men movies. And, if he has died, at least he wasn’t killed off-screen, as so many characters from X-Men: First Class are.
Do you think Havok is dead? And, for that matter, is Angel also dead? It seems pretty clear about the latter, but you never know…
