Explosions can mean that you have some repressed emotions, thoughts or words that you've released lately of feel you are close to letting out.
Someone is pushing your buttons and you are reaching your limits.
Perhaps a situation in your waking life has reached an extreme level and you feel it has the potential to be explosive. It may or may not involve you, but you may have some feelings about it nevertheless.
If you witnessed the explosion and were a distance away from it, this can indicate that the actions and comments made by others are having a negative impact on you. You are not immediately affected but the ripples are still reaching you. Do you need to distance yourself further from these people or this situation to be free of the aftermath?
It's possible that your boss, partner, family member or friend has 'blown up' at you lately over something you did wrong, however chances are, this will be short lived. Perhaps an apology or explanation is in order.
If your home was destroyed in the dream, it could signify that the things you're keeping locked up are having an effect on your home life and family or partner. Try not to let these bubbling feelings damage what it precious and find a way to let them out in a safe manner.
Your home can also represent you in your dreams so maybe you have a tendency to be self-destructive. If so- why? It might be worth exploring why this is your default position.
Another interpretation- when you are caught in an explosion in a dream- is that you are in the middle of a dispute at present or an affair that is consuming all of your thoughts and energy. You need some space away from it all to think and get some clarity.