Avoid 402 West in Lambton County, ‘Unsafe Road Surface Conditions’ Causes Closure

'Extreme heat' causes road damage on Hwy. 402

As extreme temperatures grip southwestern Ontario, a section of Highway 402 in Lambton County is closed due to damage caused by the heat.

Extreme heat damages and temporarily closes section of Highway 402

A stretch of Highway 402 was shuttered Sunday because of extreme heat affecting the pavement, a government official says.

Avoid 402 west in Lambton County, ‘unsafe road surface conditions’ causes closure

OPP have advised that a section of Highway 402 in Lambton County is closed due to “unsafe road surface conditions.”

UPDATE: Damage to Highway 402 prompts lengthy closure

Unsafe road conditions has forced the closure of the westbound Highway 402 in Plympton-Wyoming.

OPP: Unsafe road conditions on Highway 402 leads to ‘extended’ closure | Wallaceburg News | Local news in Wallaceburg, Dresden and surrounding areas.

OPP officials allege: On June 22, 2025, shortly after 6 p.m., members of the Ontario Provincial Police (OPP) responded to a report of unsafe road conditions on Highway 402 westbound. As a result, Highway 402 westbound is closed between Oil Heritage Road and Mandaumin Road in the Municipality of Plympton-Wyoming. Westbound motorists are advised to exit at Oil Heritage Road and detour following London Line to Mandaumin Road to re-enter the highway…