Wild weather raced across southern Ontario overnight.

A severe thunderstorm warning was up for much of the lower great lakes. It has since been lifted for Waterloo Region.

We had explosive lightning, heavy rains, power dips and some outages.

The wild weather may have sparked a barn fire in the Elmira area.

Waterloo Regional Police tell us some cattle died in the blaze on Listowel Road, while some other animals were relocated to neighbouring farms.