It's a day that Arizona residents brace for all year. It's something we start thinking about as early as February. How long will we be able to hold off the inevitable triple digit temperatures? This year it came on May 1st. We officially hit 100 degrees here in the Valley today. It's a few weeks early for us to be getting this warm but not too far off from the usual jump in heat. I've already had the air conditioner on in my house since late March...read more.