A thunderstorm over Hillman Marsh. (File photo courtesy of Robert Longphee)

UPDATE: Severe thunderstorm warning over

Environment Canada has ended all severe thunderstorm warnings and watches for Sarnia-Lambton County.

The weather agency upgraded a watch to a warning shortly after 9 p.m. on Tuesday as meteorologists tracked a line of severe thunderstorms capable of producing very strong wind gusts. The warning was downgraded at around 10:20 p.m.

Strong wind gusts can toss loose objects, damage weak buildings, break branches off trees and overturn large vehicles. Intense lightning is likely with any thunderstorm that develops

The Office of the Fire Marshal and Emergency Management recommends that you take cover immediately if threatening weather approaches.