Overview

• Cooler air has begun to ease temperatures in southern and eastern Ontario and parts of British Columbia, ending a multi-day heat event in those regions.
• Heat warnings persist in New Brunswick, Nova Scotia, Prince Edward Island and Newfoundland, with humidex values peaking into the 40s through Friday.
• Officials have opened hundreds of cooling centres, urged hydration and heat-safety measures, and issued workplace advisories to protect at-risk and outdoor workers.
• Agriculture Canada data show that 71% of the country remains abnormally dry to under moderate or extreme drought, while wildfires have burned about 72,000 square kilometres this season.
• Forecasts predict a general cooling trend through the week but caution there could be a short-lived heat rebound in parts of southern Ontario by the weekend.