Record heat could be hitting the Phoenix metro area early this week.
An excessive heat warning is in effect until Wednesday for the Phoenix area.
National Weather Service meteorologists say highs could reach around 113 degrees Monday and Wednesday with 117 on Tuesday.
They say overnight lows could stay in the 90s all three days.
Meanwhile, the Arizona Department of Environmental Quality extended an ozone high pollution advisory for the greater Phoenix area through Monday.
It means weather conditions combined with existing ozone levels are expected to result in local maximum eight-hour ozone concentrations that pose a health risk.
ADEQ officials say adverse health effects increase as air quality deteriorates.
Ozone is an air contaminant which can cause breathing difficulties for children as well as persons with respiratory problems.