My favourite stupidest part.
So one of the characters says "Check the news and find out what the hell's going on!" and we're shown them flicking thru channels of empty news desks and a test card to establish OMG! there's no news, no one knows whats happening! Confusion!
Then at least twice afterwards they turn on the TV and have access to a magic channel that shows the movie of what's happening right outside their apartment! Hah, lame.
I suppose the way the film tried to build suspense(and tried to eke out the VFX budget) was to have them hiding in the apartment for most of the film peeking thru the blinds, just cutting to the outside may have interrupted the claustrophobia, but the magic TV channel was a really dumb cop out.
And don't anyone try and say it was the emergency broadcast, that would giving people information about what to do, "stay indoors, conserve water, wait for the all clear" etc. so no.