As southern Ontario experiences a shift from subzero temperatures to warmer weather, communities are being alerted to the risk of flooding due to the melting of snow and ice. The Grand River Conservation Authority has issued a flood warning for regions that include Kitchener, Waterloo, Guelph, and Brantford, highlighting the dangers posed by rising water levels influenced by both the melting snow and the forecasted rain. Officials are particularly concerned about the combination of these factors causing rapid water level increases, which could lead to dangerous situations.

The conservation authorities are emphasizing the risk of ice jams as a consequence of melting snow and weakening ice on rivers. Ice jams can severely disrupt the natural flow of water and frequently lead to localized flooding scenarios, particularly in areas where drainage is insufficient. This warning extends to vulnerable areas, with a specific mention of potential flooding in communities served by the Halton Conservation Authority, which includes Oakville, Burlington, and Milton, where low-lying regions are at increased risk.

Historical data suggest that the combination of warm temperatures melting snow and subsequent rain has previously led to significant flooding events. Conservation officials are urging residents to prepare for possible floods, especially in natural floodplains and regions already known for poor drainage. As temperatures are expected to remain above freezing, vigilance is necessary to mitigate the impact of potential flooding in southern Ontario communities.