Why did Augustus establish professional fire brigades and urban police forces in Rome?

Augustus established professional fire brigades and urban police forces to replace the inadequate, amateur system of municipal administration with permanent, professional institutions, thereby transforming Rome into a stable capital for the Roman Empire.1

• Fire Brigades: Augustus initially organized a fire service using public slaves in 21 BCE. Following a major fire in 6 CE, he established the vigiles, a professional corps consisting of seven cohorts of 1,000 freedmen each, to provide effective fire protection for the city.1
• Urban Police: To address the frequent violence in Rome’s streets, Augustus created three cohorts under the command of the urban prefect. Their primary duty was to maintain public order, with the authority to request assistance from the Praetorian Guard when necessary. The vigiles also assisted with minor police duties, particularly during the night.1

These reforms were essential for managing the challenges of a densely populated city and represented a significant departure from the disorganized, amateur practices of the republican era.1