Matthew Baldwin is setting an unexpectedly hot pace at the BMW PGA Championship after shooting 6-under 66 to establish a two-stroke lead after the second round.

Rory McIlroy lost the club head on his 9-iron and then lost the lead by going out of bounds on the last hole in shooting an eventful 5-under 67 in the first round of the BMW PGA Championship.

As we face the harsh reality of high heat for the remainder of the week, it's crucial to understand the rapid and severe impact it can have on all of us.