However, itâs also a time to be aware of the dangers soaring temperatures can bring. Extreme heat is the number one weather-related killer in the U.S, claiming more than 650 lives across the nation each year, according to the Centers for Disease Control and Prevention.
1 In a bowl whisk together garlic, extra virgin olive oil, balsamic, 1/4 cup red wine, 1 tablespoon chopped rosemary, salt and pepper.  Place flat iron steak in a resealable plastic bag. Pour marinade over the top. Shake to coat steak in marinade. Refrigerate for 8 hours or overnight.
Beef Marinade. 1  Marinating is best suited for the tougher steak cuts like flank, skirt, sirloin, round and hanger. 2  These cuts can usually marinate up to 24 hours. 3  You can actually ruin better-quality steaks, like porterhouse or rib-eye, by marinating them.eef Marinade. 1  Marinating is best suited for the tougher steak cuts like flank, skirt, sirloin, round and hanger. 2  These cuts can usually marinate up to 24 hours. 3  You can actually ruin better-quality steaks, like porterhouse or rib-eye, by marinating them.