Clutter that blocks exits is everyone’s risk
Yes. When stored items, clutter, or hoarding create a fire hazard — especially in shared hallways, stairwells, or exits — a landlord generally can and should address it, because it endangers everyone in the building.
Piles of belongings that block escape routes, cover heaters, or crowd electrical panels can feed a fire and trap people trying to get out. Landlords have a duty to keep common areas and exits safe and clear, and they usually have the authority to require that dangerous blockages be removed.
If a neighbor's clutter is creating a fire risk, report it to your landlord in writing and describe exactly where the hazard is and why it is dangerous. If the landlord does not act, your local fire department or code-enforcement office can inspect blocked exits and shared areas and order the problem fixed.
Hoarding situations can be sensitive, but safety comes first when exits and shared spaces are involved. If a serious hazard is being ignored, a free, confidential review can explain your options.
This is general information about California tenant rights, not legal advice. Every situation is different.