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.
Let come to room temperature, 20 to 30 minutes. Heat a large cast-iron skillet over medium, then add oil and garlic. When oil is hot but not smoking, push garlic to the edge of pan and add steaks, rosemary side up.Cook steaks until a dark-brown crust forms on the bottom, about 5 minutes.eat a large cast-iron skillet over medium, then add oil and garlic. When oil is hot but not smoking, push garlic to the edge of pan and add steaks, rosemary side up.