Canada: Adverse weather forecast across eastern regions through at least July 11

Severe weather is forecast over parts of eastern Canada through at least July 11. A disorganized weather system associated with the remnants of Hurricane Beryl is expected to bring heavy rainfall and thunderstorms across the region. Strong winds, large hail, and possible tornadoes may accompany storms. Heavy downpours may trigger flooding in low-lying areas, and strong winds may cause property damage and power outages.

As of July 10, Environment Canada has issued red heavy rainfall warnings (the highest level on a three-tier scale) across parts of central New Brunswick and western Prince Edward Island; rainfall amounts of 4-7 cm (1.6-2.8 inches) with localized heavier amounts of more than 10 cm (3.9 inches) are possible in the affected areas. A severe thunderstorm watch is in place across parts of central Newfoundland Island. Special weather statements have been issued for parts of southern New Brunswick, northeastern Nova Scotia, central and eastern Prince Edward Island, and the Magdalen Islands in Quebec. Authorities will likely issue new alerts or update/rescind existing advisories as weather conditions change over the coming 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 located 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 the soil has become saturated by heavy rainfall.

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

Severe weather may trigger flight delays and cancellations at airports across the affected region. Flooding could block regional rail lines; freight and passenger train delays and cancellations are possible in areas with heavy rainfall and potential track inundation.

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.