It's already 27C at Winnipeg airport as of 8 am, after an overnight low of only 24C, a record warm night for July 24th (and one of the warmest minimum temperatures on record in Winnipeg). I think we have a good shot at hitting 35C today provided we stay sunny all day. With dewpoints of 23c, that will give peak humidex values of 45 this afternoon, the steamiest day of the heat wave so far.
Tonight will be another warm one.. with a low of only 25C, maybe even 26 or 27C as we get a southerly breeze all night. If so, that will be Winnipeg's second warmest minimum temperature on record (warmest minimum was an amazing low of 28.3C on July 12 1936 following Winnipeg's hottest day ever of 42.2 on July 11) However, that low of 25C will likely not be the minimum for Wednesday. The heat-wave ending cold front will be coming through by midday, so temperatures will be dropping noticeably in the evening, likely below 25C by midnight.