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.
Add steaks to marinade, turning to coat. Cover and marinate steaks at room temperature 1 hour, turning occasionally. 2. Heat a cast-iron skillet over medium-high heat. Remove steaks from dish; discard marinade. Place steaks in pan; cook, without disturbing, 2 minutes or until steaks release easily from bottom of pan.Turn steaks over; cook 2 minutes. Turn steaks over, and cook an additional 2 minutes or until desired degree of doneness.eat a cast-iron skillet over medium-high heat. Remove steaks from dish; discard marinade. Place steaks in pan; cook, without disturbing, 2 minutes or until steaks release easily from bottom of pan. Turn steaks over; cook 2 minutes. Turn steaks over, and cook an additional 2 minutes or until desired degree of doneness.