Canada: Adverse weather forecast across far southern New Brunswick and most of Nova Scotia through at least early April 13

Severe weather is forecast across parts of far southern New Brunswick and most of Nova Scotia through at least early April 13. As of late April 12, Environment Canada has issued the following warnings:

• Red rainfall warnings (the highest level on a three-tier scale): Atlantic coast of mainland Nova Scotia. Thunderstorms, rainfall totals of 4-6 cm (1.6-2.4 inches), and strong winds of around 80 kph (50 mph) are forecast through April 12. Conditions are forecast to improve from west to east through the evening of April 13.

• Red wind warnings: Grand Manan and coastal Charlotte County in New Brunswick through the evening of April 12; southerly winds of 90 kph (56 mph) are forecast. Margaree Harbour to Bay St. Lawrence in Nova Scotia through early April 13; southeasterly winds of up to 110 kph (68 mph) are forecast.

Officials may update and extend the coverage of weather alerts over the coming hours.

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 or mountainous areas, especially where heavy rain has saturated the soil.

Authorities could issue mandatory evacuation orders for flood-prone communities over the coming days. Disruptions to electricity and telecommunications services are possible where significant flooding or landslides impact utility networks.

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 may temporarily close low-lying routes that become inundated by floodwaters.

Severe weather could cause 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 may occur in flood- or tornado-hit areas; some businesses might not operate at full capacity because of damage to facilities, possible evacuations, and employees' inability to reach work sites.