Laval waterfront residents are on high alert after the Mille-Illes and Rivière-des-Prairies spilled their banks late Thursday, flooding streets and homes.

Several streets and three riverside homes in the Fabreville district of Laval were evacuated, civil authorities said.

A bridge spanning the Chaudière River near St-Joseph de Beauce was also closed to traffic because of high water levels.

Rivière-des-Prairies and the Mille-Illes cause flooding every year and public security authorities have an emergency plan that includes shelter in community centres for any people forced from their homes, said Laval Mayor Gilles Vaillancourt.

Mild temperatures forecast in the next few days will cause the water levels to rise more even more, Vaillancourt said.

Elsewhere in Quebec, authorities are on alert for flooding along the L'Assomption, Nicolet, Saint-Francois, Yamaska and Bécancour rivers.