A fire caused by slow accidental process called spontaneous combustion can start in paint soaked rugs that are stored in a close it.

Which of the precautions listed below is the most effective action to take in guarding against this hazard?
Keep a fire extinguisher nearby to put out fires quickly
Store such materials in seal metal containers if they must be kept
Use only latex based paints
Read instructions on paint containers carefully
Check the closet at regular intervals for signs of smoke heater chemical Odors

The most effective action to take in guarding against the hazard of spontaneous combustion in paint soaked rugs stored in a closet is to store such materials in seal metal containers if they must be kept. This will contain any potential fire and reduce the chances of it spreading. Additionally, it is important to ensure proper ventilation in the storage area and to dispose of any flammable materials that are no longer needed.