The ideal temperature settings for your freezer and refrigerator play a crucial role in food preservation and energy savings, yet many homes still fall short.

Denver broke the daily record high temperature for Aug. 4 with Denver International Airport thermometers topping out at 102 degrees just after 2 p.m. Sunday, according to the National Weather Service.

Climate change is shrinking the difference between the daily high temperature and the daily low in many parts of the world. The gap between the two, known as the diurnal temperature range (DTR ...