Heat warning in effect for London, Midwestern Ontario, sports fields closed

CTV London Meteorologist Julie Atchison brings you the latest weather update for June 23, 2025.

Due to a heat warning in London, all sports fields, including soccer, baseball, cricket pitches, and beach volleyball courts, are closed.

“This is extreme heat, and it can be dangerous for some at times,” said CTV London Meteorologist Julie Atchison.

“If you are spending an extended period of time outdoors, you want to drink plenty of water. You need to take breaks; you need to find cold spaces. I know many of you are working outdoors, please be careful. When we start to feel temperatures like this from 40 C to 45 C, this is when we start to see heat-related illness.”

Atchison reminded that heavy exercise outside should be avoided. When temperatures hit higher than 45 C, there is potential for heat stroke.

“Temperature wise in London right now, 32 C, but feeling a whole lot warmer than 30 C, 31 C in Midwestern Ontario,” she said.

“We will be dealing with this heading into tomorrow. Now, there is a potential for a few pop-up showers, a risk of thunderstorm over the next couple of days, but we have a weak front that will be weaving its way through. We will still hold onto the higher humidity, so this is not widespread rainfall, but the chance for a few showers.”

Here’s the rest of your forecast:

Monday: Heat warning in effect. Sunny, wind southwest gusting 20 km/h to 40 km/h. High 35 C, humidex 43 C.

Monday night: Clear. Wind staying consistent. Low 24.

Tuesday: Sunny in the morning then a mix of sun and cloud with a 40 per cent chance of showers in the afternoon. Risk of thunderstorms. Wind becoming southwest 20 km/h gusting to 40 km/h. High 32 C, humidex 41 C.

Tuesday night: Cloudy periods with a 30 per cent chance of showers. Low 20 C.

Wednesday: Cloudy with a 40 per cent chance of showers. High 30 C.