A Heatwave Is Coming: How To Protect Your Vehicle’s Windscreen In Hot Weather Temperatures in London and Greater London are predicted to reach 27 degrees this week, with warm weather likely continuing into next week. While sunshine is always welcome, extreme heat can have serious consequences for your vehicle — particularly your windscreen.   Heat causes windscreens to expand, which can worsen even minor chips or cracks. Left unchecked, small issues can quickly turn into