The FIA has declared a Heat Hazard for this weekend's Formula 1 Austrian Grand Prix, encouraging drivers to either wear cooling vests or attach ballast to their cars.<br>Mainland Europe has been smothered by its first major heatwave of the summer, with Austria one of several countries breaking June temperature records.<br>With temperatures at Spielberg's Red Bull Ring expected to hover over 31C ...<a class='more' href='https://www.autosport.com/f1/news/fia-declares-heat-hazard-for-f1-austrian-grand-prix/10833039/?utm_source=RSS&utm_medium=referral&utm_campaign=RSS-ALL&utm_term=News&utm_content=uk'>Keep reading</a>