Dreams involving family members, like your brother, often reflect your feelings about your relationships or your concerns for their well-being. The imagery of your brother in a bucket being swung over lava can symbolize a feeling of helplessness or anxiety regarding a situation in your life or your brother's life. The lava might represent intense emotions or a dangerous situation, while your crying suggests that you are deeply affected by this scenario.

Consider what aspects of your relationship with your brother or what external pressures might be causing you stress or fear. This dream may be urging you to confront those feelings, communicate with your brother, or address any concerns you have about his safety or choices. Reflecting on these emotions in your waking life could help you find more clarity and peace.