US GP second F1 race in row to be 'heat hazard' The United States Grand Prix in Austin is the second race in succession to be declared a "heat hazard" under F1's rules. Original Source: https://www.bbc.com/sport/formula1/articles/c8r0lgk2mmno?xtor=AL-72-%5Bpartner%5D-%5Byahoo.north.america%5D-%5Bheadline%5D-%5Bsport%5D-%5Bbizdev%5D-%5Bisapi%5D
