July 29, 2026: Heat Warnings Cover Northwestern Ontario as Thunderstorm Risk BuildsKENORA – WEATHER – Northwestern Ontario is entering another hot and humid day, with yellow heat warnings in effect for Kenora, Dryden and Vermilion Bay, Fort Frances, Sioux Lookout and Red Lake. Dryden and Vermilion BayWednesday, July 29A mix of sun and cloud will bring a 30 per cent chance of showers during the late morning and afternoon. Sioux LookoutWednesday, July 29A mix of sun and cloud will bring a 30 per cent chance of showers during the late morning and afternoon. Thursday, July 30Thursday will be cloudy with a 40 per cent chance of showers and a risk of a thunderstorm. Summary: Yellow heat warnings cover Kenora, Dryden, Vermilion Bay, Fort Frances, Sioux Lookout and Red Lake, with Humidex values near 38 and thunderstorms possible through Thursday.