Transport Canada flew a plane over the region on April 29 to get an overview of the flooding along the river.
The images below show the extent of flooding in many of those communities.
The Chaudière Falls are seen from the air. (Transport Canada )
Ottawa's Britannia neighbourhood, where waters were expected to peak on Thursday, is seen from the air. (Transport Canada )
Constance Bay in Ottawa's rural west end is seen from the air. Much of the area has since been evacuated because floodwaters have risen. (Transport Canada )
The paths near Parliament Hill have been completely flooded and closed by the National Capital Commission. (Transport Canada)
The National Capital Commission has closed all access to Bate Island because of the rising waters. (Transport Canada )
The Hull Marina in Gatineau, Que., is under water. (Transport Canada )
Homes in the Pointe-Gatineau neighbourhood have been consumed by the floodwaters. (Transport Canada )
Petrie Island in Ottawa's east end is essentially under water. (Transport Canada)
Homes in the Clarence-Rockland, Ont., area east of Ottawa are being surrounded by rising river water. (Transport Canada. )