Amazing mix in the intro, great atmosphere and space!
Rest of the song sounds spot on too, really nice. I feel the drums are slightly too laid back, try nudging the kick and snare forward just a little bit in time, they feel a tad late especially at the start of the song.
Outtro is excellent too. If I’m honest I feel the sound effects you’re using (screaming/crying/sirens etc) don’t really fit. There’s not enough of them to convey the total mayhem you would expect during some big disaster, they sound a bit fake when you use them isolated like this. I hope that makes sense 
. Big respect for the mix and writing though!