Six people were killed after torrential rain and powerful winds battered Buenos Aires, knocking out power, downing trees and damaging homes, officials said Tuesday.

More than six inches (155 mm) of rain fell between midnight Monday and 7 am Tuesday, the city weather service said. That is a record for rainfall in April in the Argentine capital.

One of the dead was a subway worker electrocuted while trying to pump water out of a flooded station, union official Enrique Rosito said.

The other victims were three men and two women killed in flooding and other damage caused by the storm, said Alberto Crescenti of the emergency medical service SAME.

Flash flooding was worst in northern parts of the city, where widespread construction over the past decade has not been matched by upgrades to the drainage system, environmentalists said.

The storm and deluge of water knocked out electricity, sent cars floating down streets, damaged poorly built homes, knocked out power and forced suspension of train service.