Ian Happ homered twice and drove in four runs, and the Chicago Cubs held off Cal Raleigh and the Seattle Mariners for a 10-7 victory.

Extreme heat and howling winds made for a home-run heaven for hitters, but it wreaked havoc on defenders and even got dangerous, with an umpire and Mariners pitcher leaving the game.

The conditions figured to be the story of Saturday’s Mariners game here against the Cubs even before it began, with the forecast calling for extreme heat buffeted by high winds.