Daytime highs will climb to between 30 and 34 C, Environment Canada said, with humidity making it feel as sticky as 42.

A multi-day heat warning has been issued for the Ottawa region by Environment Canada. The advisory posted Saturday evening said daytime high temperatures would range from 30 C to 34 C, with humidex values of 38 to 42. Nighttime low temperatures of 19 C to 23 C would provide little relief from the heat, the weather agency added.

Environment Canada is warning of a 'multi-day heat event' that will bring temperatures in the low-to-mid 30s to Ottawa-Gatineau and the wider region starting Sunday.