Still alive

I don't think this song is really about the city.

~I have changed just like you. Just like you.

For how long? For how long must I wait? I know there's something wrong. ~

I think this is about someone she cares about.

~Your concrete heart isn't beating and you tried to make it come alive. ~

The person she cares about "had a concrete heart" meaning he/she is cold or emotionless. And he wants to make it "come alive" As in, feel something.

~No shadows, just red lights. Now I'm here to rescue you.~

She wants to save him, and there are no "shadows" as in secrets, just "red lights" Like an alarm. Maybe she's afraid he's going to kill himself.

~Oh I'm still alive, I'm still alive. I can't apologise, no.~

Maybe he died, she can't apologize for her not being able to save him because she's still alive.

~So silent, no violence. But inside my head so loud and clear.

You're screaming... You're screaming... Cover up with a smile I've learned to fear.~

Most people hide their pain or suffering with a smile when the feel the worst, and knowing something is wrong and maybe that he is losing himself, she's afraid of his smile and she can tell he's screaming inside.

~Just sunshine and blue sky. That's just how it goes for living here.~

This is referring to the world we live in, in the way most people only see the sunshine, which makes it hard to tell when people see the world darker.

~Come fire, come fire, let it burn and love come racing through.~

She wants to love him, or for him to know how much she does.

~Learn to lose, learn to win, turn my face against the wind.

I will move fast, I will move slow. Take me where I have to go.~

She's saying she will do anything to help him. No matter what as long as he will let her.