Arizona Department of Environmental Quality officials said the pollution levels on Saturday could exceed the federal health standards.

With that possibility, ADEQ has extended Friday’s alert into Saturday, April 22, and has restricted outdoor burning and other activities for the day.

Restrictions include:

• Wood burning in residential fireplaces, chimeneas, outdoor fire pits and similar outdoor fires is prohibited in Maricopa County. It includes individuals and businesses which have burn permits for open burning.
• Employees and contractors of government entities are prohibited from operating leaf blowers. Residents are encouraged to avoid leaf blowing.
• Off-road vehicle use should be avoided.
• Driving should be kept to a minimum.

Officials also advise:

• Fuel vehicles after dark or during cooler evening hours.
• Reduce time waiting in long drive-thru lines.
• Delay big painting projects until HPAs have passed.