With Arizona temperatures reaching upwards of 105 degrees Fahrenheit in recent weeks, it’s no wonder Chandler, Arizona air conditioning contractors are the heroes of the city. But these experts aren’t being praised solely for the services they provide, they’re also working shifts over 20 hours long in an effort to restore comfort and break the unbearable heat. Some air conditioning and heating contractors in Chandler say their work day begins at 5 a.m. and doesn’t end until 1 or 2 a.m. during the season’s highest energy usage period. As a result of the heat, health officials warned against being outdoors for prolonged periods of time and that young children and the elderly should be especially careful to remain in cool areas.