Wisteria allowed to grow on houses can cause damage to gutters, downspouts, and similar structures. Trees were downed and some roof gutters damaged. Ruts prevent rainwater from flowing to the side of the road into ditches or gutters. Roof runoff contributes high levels of synthetic organic compounds and zinc (from galvanized gutters). Even gutters from houses and buildings can connect to the storm drain. The pitch of the roof and the height of the gutters can vary greatly. By the 1870s all houses were constructed with cast iron gutters and down pipes. Curbs with integral gutters are used where better hydraulic flow performance is needed. Water from rain gutters may be harvested in a rain barrel or a cistern. Open sewers, consisting of gutters and urban streambeds, were common worldwide before the 20th century. Rain gutters, door mirrors, and door handles are also finished in chrome. Rain was no longer sufficient to wash away waste from the gutters. Large numbers may also be found in rain gutters of homes. Other breeding sites include&colon; natural marshes, cesspits, gutters, and other unkempt artificial water structures. Its sharp claws allow climbing of trees and house gutters.