Wednesday is the 'cool' day, this week, but that's not really saying much

Wednesday will be the coolest day of the week, but it will still be above normal. Expect a high of 20 C with sun and cloud.A ridge of high pressure will start to do its magic on Thursday. Expect high 20s on Thursday. By Friday and the weekend, expect summer heat – potentially record-breaking. There will likely be heat warnings issued later this week.