Generally, apocalyptic dreams such as this (especially those of a violent nature) suggest feelings of helplessness and loss of control. You may be experiencing destructive feelings of hostility and rage.
Alternatively, your subconcious could be expressing a desire to wipe out some part of yourself.
On another level of interpretation, it may be suggesting that a big change is headed your way.

Lava is suggestive of rage that you have kept pent up inside of you.
Sirens are representative of a stressful situation in your waking life that needs your attention.
To see red sky in your dream suggests that something is coming to an end.

Remember, when it comes to dream interpretation, the smallest symbols can make a huge difference! I hope that my interpretation helps you to come to a conclusion on your dream.

On another note, I am no stranger to apocalyptic dreams such as this. They are terrifying and can definitely cause you to feel anxious and afraid for days after the dream actually occurred. Sometimes, it's very difficult to remember that it was indeed just a dream because it feels like so much more.