As more immigrants arrived in American cities in the late 19th century, urban populations skyrocketed. This posed major challenges for city governments, including providing adequate housing, transportation, water, sanitation, crime prevention, and fire protection for the growing populations. Common problems included overcrowded tenement housing, lack of indoor plumbing and clean water, piles of horse manure in the streets, increased crime rates, and destructive fires due to buildings being close together and made of wood. Cities struggled to establish effective police, fire, and sanitation services to address the problems that arose from rapid urban growth and industrialization.