If the power goes out when you aren't home, everything from meat to milk will be at risk. But if the power returns before you do, you'll never know if your fridge was running the whole time or not.Here's a simple trick you'll want to remember if you'll be away during bad weather. As Sheila Pulanco Russell, from North Carolina, explained in a Facebook post, all you need for this trick is a quarter and cup of water. Put the water in the freezer until it's frozen solid. Then, take it out and put a quarter on top of the ice. Return the cup – with the quarter – back to the freezer. All of that may seem pointless, but there's a reason this trick resurfaces during hurricane and winter storm seasons. When you return, if you find the quarter has moved to the bottom of the cup, then you'll know your food was unrefrigerated while you were gone and it's no longer safe to eat. Found the quarter in the middle? The food is likely still OK, but, as Russell advised, "If you don't feel good about your food, just throw it out."Where you ideally want the quarter to be is exactly where you left it — on the top. That means your freezer's contents stayed frozen the entire time. Genius, right? (h/t HelloGiggles)