Significant rainfall is expected this weekend.
Environment Canada has issued a special weather statement for Sarnia-Lambton.
Rain, heavy at times is expected to begin Saturday evening and continue into Sunday. There's also the risk of thunderstorms.
The national weather agency said 20 to 40 millimetres of rain is possible.
The frozen ground has a reduced ability to absorb this rainfall.
Localized flooding in low-lying areas and water pooling on roads are possible.