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.
Make certain the grill is extremely hot by allowing it to heat for 10 minutes before adding the steaks. Place the meat on the hottest portion of the grill and cook, undisturbed for 7 to 10 minutes per side for rare meat or 8 to 12 minutes for medium-rare.If you'd like the steaks to have cross-hatch marks, turn the meat 30 degrees after the first three to four minutes of cooking time has elapsed for each side.ortunately, you can avoid disappointingly tough, over-cooked porterhouse steaks by understanding the basic precepts of successfully cooking thick steaks on the grill -- how to prepare the meat in advance, how long to cook the cook the steaks and how to correctly judge their doneness.