Canada: Adverse weather forecast across parts of central and eastern Ontario through at least early April 28

Severe weather is forecast across parts of central and eastern Ontario through at least April 28. A weather system will move in from the Great Lakes late April 26-early Arpil 27 and bring heavy rainfall and thunderstorms across the affected area through early April 28. Strong wind gusts, lightning, and hail may accompany storms. Heavy downpours may trigger flooding in low-lying areas and landslides on unstable slopes. As of April 26, Environment Canada has issued special weather statements across the affected area due to significant rainfall expected over the coming days. Rainfall totals of 1.5-4 cm (0.6-1.6 inches) are likely across the region, with heavier amounts possible during thunderstorms. Officials may update and extend the coverage of weather alerts 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 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 will likely 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.