RIO DE JANEIRO (AP) — Heavy rains in Brazil’s southern Rio Grande do Sul state have killed at least eight people and left 21 missing since Monday, the country’s civil defense said Wednesday.

An additional 11 people were injured and more than 1,400 were forced to leave their homes due to damage caused by the storms, the civil defense added.

Operators reported electricity and water cuts across the state, and officials detailed numerous incidents of flooded roads, landslides and collapsed bridges as water levels of rivers and streams rose sharply.

Authorities activated the Brazilian Air Force to assist stranded people. It deployed two helicopters for the rescue mission.

The downpour started Monday and was expected to last through Friday, civil defense authorities said.

In some areas, such as valleys, mountain slopes and cities, more than 150 millimeters (6 inches) of rain fell in 24 hours, said Brazil’s National Institute of Meteorology, known by the Portuguese acronym INMET, on Tuesday.