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Local briefings: Arizona Department of Emergency Management. Listed by USA.gov.

Hazard · Air you can't see

Chemical and hazardous-material releases

Some toxic chemicals have no smell. Go upwind, or go in and seal one room — whichever officials say.

Federal steps in this chapter do not change by state. Local orders for Arizona come from Arizona Department of Emergency Management.

6 min read · Updated October 2026

Signs

Ready.gov lists these signs of a chemical release. Some toxic chemicals have no odor.

  • Trouble breathing.
  • Eye irritation.
  • Loss of coordination.
  • Nausea.
  • Burning in the nose, throat, and lungs.
  • Many dead insects or birds.

Before

  • Put duct tape, scissors, and plastic sheeting in your kit.
  • Learn how to run your home's ventilation system.
  • Pick an above-ground shelter room with as few openings as possible.
  • Ask your Local Emergency Planning Committee about chemicals stored in your area.

If told to evacuate

  • Go immediately.
  • To find a public shelter, text SHELTER plus your ZIP code to 43362.
  • Get out of the building without passing through the contaminated area.

If told to stay inside

  • Bring pets in.
  • Go to an interior room. Close and lock doors and windows. Close vents and fireplace dampers.
  • Seal the room with plastic sheeting and duct tape.
  • Turn off air conditioners and ventilation, or set them to 100% recirculation.
  • Seal gaps with wet towels, plastic, tape, wax paper, or foil.
  • If gas may have entered, take shallow breaths through a cloth.

If you're outside

  • Move upwind of the source.
  • If you're in a car, close the windows and vents and shut off the air conditioner and heater.

After

Don't go outdoors, even to help others, until officials say it's safe.

To decontaminate: remove all clothing. Cut off anything that would be pulled over your head. Bag the clothing. Flush your eyes with water. Wash with soap and water.

Household chemicals: never mix bleach and ammonia. Poison Control: 1-800-222-1222 (Red Cross).

Checklist

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Sources

Public pages this chapter leans on. They win if anything here is out of date.

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Not a substitute for instructions from fire, police, public health, or the utility. If you are in danger now, call 911.