Canada: Severe weather forecast to continue across southeastern regions through at least Nov. 21

Severe weather is forecast to continue across parts of southeastern Canada through at least Nov. 21. Flooding is possible in areas where sustained heavy rainfall occurs. Strong winds may cause property damage and power outages.

As of late Nov. 19, Environment Canada has issued red rainfall warnings (the highest level on a three-tier scale) from Norman Bay to Lodge Bay, northern Peninsula East, and northern Avalon Peninsula in Newfoundland and Labrador Province. 5-9 cm (2-3.5 inches) of rainfall is forecast. Red strong wind warnings are in place for parts of far eastern Quebec Province. Authorities will likely issue new alerts or update/rescind existing advisories as weather conditions change over the coming hours and days.

Sustained heavy rainfall could trigger flooding in low-lying communities near rivers, streams, and creeks. Urban flooding is also possible in developed areas with easily overwhelmed stormwater drainage systems. Sites downstream from large reservoirs or rivers may be subject to flash flooding after relatively short periods of intense rainfall. Landslides are possible in hilly areas, especially where heavy rain has saturated the soil.

The severe weather could contribute to transport disruptions throughout the region. Floodwaters or ice accumulations may render some bridges or roadways impassable, impacting overland travel in and around affected areas. Ponding on road surfaces and slippery ice could cause hazardous driving conditions on regional highways. Authorities could temporarily close some low-lying routes that become inundated by floodwaters.

Localized business disruptions could occur in flood-hit areas; some businesses might not operate at full capacity because of damage to facilities, possible evacuations, and some employees' inability to reach work sites. Strong winds could also cause power outages.