Mercury To Hit 32C At Weekend Britain has already been basking in sunshine for over a week but this weekend could bring the hottest day of the year so far. Temperatures on Friday are expected to reach 27C in some places but it is Saturday that looks like the scorcher. Sky's weather producer Joanna Robinson said 32C is possible in southeast England. In July 2006 Wisley, Surrey, saw the mercury rise to 36.5C after a fortnight-long hot spell. Although temperatures in London will soar, Robinson said most other places will be a few degrees cooler with isolated thunderstorms expected over northern England and the East Midlands. The Met Office has said there is a 70% probability of heatwave conditions between 12pm on Friday and 8pm on Sunday. It has set its watch level to two, out of four possible levels, which warns the public to be alert and prepared for the sun and heat. In August 2003 temperatures hit 38C and the Department of Health estimated there were 2,000 to 3,000 more deaths than usual in England. It provides guidelines on how to stay safe in a heatwave, including having cool baths and showers, wear loose clothing and identify the coolest room in the house to seek sanctuary in. It also reminds people to look after the very young, very old or those with chronic diseases. The heat will be welcomed by those attending the T In The Park festival in Kinross-Shire, Scotland, this weekend and for the final few days of the Ashes first test at Trent Bridge. Temperatures are expected to stay in the high-20s going into next week too.