Orange rainfall warnings have been issued for Hwy 3 and the Coquihalla Highway. 

Environment Canada said as much as 80 millimetres of rain is expected along the routes.

Orange warnings mean “severe weather” that could “cause significant damage.” 

In its bulletin, Environment Canada said “a stronger frontal system” arrived overnight and is set to bring “significant rain to the region.” 

“The heaviest rainfall amounts are expected on Monday with freezing levels rising to 2500 metres by Monday afternoon,” the statement reads.

“Strong and gusty southerly winds Monday morning shift to southwesterly Monday Afternoon.” 

The affected parts of the highways are Hope to Merritt on the Coquihalla and Hope to Princeton via Allison Pass on Hwy 3.

Environment Canada said the rainfall is expected to “ease” by the evening.

But it warned: “Localized flooding is likely. Some roads may become impassable. Travel delays and/or cancellations are likely. Landslides may occur in vulnerable areas such as steep slopes, deforested areas or recent burn scars.”