Two Ontario municipalities have declared states of emergency due to major flooding in the Niagara Region.

St. Catharines and the nearby town of Lincoln both issued the declarations Monday after back-to-back storms dumped a combined 250 millimetres of rain on parts of the region in a single week.

Officials in St. Catharines say the “historic storms” have overwhelmed the city’s roads and sewers, flooded homes and businesses, and eroded parts of its shoreline.

In response to the recent flooding in the Niagara Region, the province is working closely with impacted municipalities to provide support and assist with flood recovery.

— Doug Ford (@fordnation) August 3, 2026

I want to thank all of the first responders and staff at all levels of government who have been working… pic.twitter.com/69GIbyfWDZ

In a news release, city officials say the risk of further impacts if another storm hits remains elevated.

Similar issues were reported in Lincoln where officials say flooding was exacerbated by widespread power outages.

Officials say that even as weather conditions return to normal, the state of emergency ensures they have every available tool to support the recovery.