Data source: National Weather Service (NWS)

Flooding

Flash Flood Warning (WARNING) - expires August 21, 2026 at 11:15 PM EDT

Areas affected: Pima, AZ

Flash Flood Warning issued August 21 at 6:10PM MST until August 21 at 8:15PM MST by NWS Tucson AZ

FFWTWC

The National Weather Service in Tucson has extended the

• Flash Flood Warning for... Central Pima County in southeastern Arizona...

• Until 815 PM MST.

• At 610 PM MST, Water levels are slowly receding from the 1 to 3 inches of rain that fell earlier this afternoon along Highway 286 at Altar Wash. Flash flooding is likely still ongoing. Additional thunderstorms will move across this area through 7 pm.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar and automated gauges.

IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas.

• Some locations that will experience flash flooding include... Mainly rural areas of Central Pima County along and near Highway 286 between Three Points and Arivaca Road.

This includes Route 286 between mile markers 22 and 34.

This includes the following streams and drainages... Brown Wash, Fresno Wash, Altar Wash, Cerro Prieto Wash, Saucito Wash and Banner Wash.

What to do: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.

Source: NWS Tucson AZ

Air Quality

Air Quality Alert (ADVISORY) - expires August 21, 2026 at 11:00 PM EDT

Areas affected: Tucson Metro Area including Tucson/Green Valley/Marana/Vail

Air Quality Alert issued August 21 at 1:22PM MST by NWS Tucson AZ

The Pima County Department of Environmental Quality (PDEQ) has issued an Ozone Action Day for the Tucson Metro area until 8 PM MST this evening.

This means that forecast weather conditions combined with existing ozone levels are expected to result in local maximum 8-hour ozone concentrations that pose a health risk. Adverse health effects increase as air quality deteriorates.

Ozone is an air pollutant which can cause breathing difficulties for children, older adults, as well as persons with respiratory problems. A decrease in physical activity is recommended.

You are urged to car pool, telecommute, or use mass transit. The use of gasoline-powered equipment should be reduced or done late in the day.

For details on this Action Day, visit the PDEQ website at www.pima.gov/deq or call 520-724-6885.

Source: NWS Tucson AZ

Air Quality Alert (ADVISORY) - expires August 24, 2026 at 12:00 AM EDT

Areas affected: Maricopa, AZ

Air Quality Alert issued August 21 at 9:18AM MST by NWS Phoenix AZ

AQAPSR

The Arizona Department of Environmental Quality (ADEQ) has issued an Ozone High Pollution Advisory for the Phoenix Metro Area through Sunday.

This means that forecast weather conditions combined with existing ozone levels are expected to result in local maximum 8-hour ozone concentrations that pose a health risk. Adverse health effects increase as air quality deteriorates.

Ozone is an air contaminant which can cause breathing difficulties for children, older adults, as well as persons with respiratory problems. A decrease in physical activity is recommended.

You are urged to car pool, telecommute or use mass transit. The use of gasoline-powered equipment should be reduced or done late in the day.

For details on this High Pollution Advisory, visit the ADEQ internet site at www.azdeq.gov/forecast/phoenix or call 602-771-2300.

Source: NWS Phoenix AZ

Air Quality Alert (ADVISORY) - expires August 22, 2026 at 12:00 AM EDT

Areas affected: Maricopa, AZ

Air Quality Alert issued August 20 at 9:09AM MST by NWS Phoenix AZ

AQAPSR

The Arizona Department of Environmental Quality (ADEQ) has issued an Ozone High Pollution Advisory for the Phoenix Metro Area through Friday.

This means that forecast weather conditions combined with existing ozone levels are expected to result in local maximum 8-hour ozone concentrations that pose a health risk. Adverse health effects increase as air quality deteriorates.

Ozone is an air contaminant which can cause breathing difficulties for children, older adults, as well as persons with respiratory problems. A decrease in physical activity is recommended.

You are urged to car pool, telecommute or use mass transit. The use of gasoline-powered equipment should be reduced or done late in the day.

For details on this High Pollution Advisory, visit the ADEQ internet site at www.azdeq.gov/forecast/phoenix or call 602-771-2300.

Source: NWS Phoenix AZ

Source

Alert data provided by the National Weather Service (NWS). This page shows active alerts only and is refreshed daily. For real-time updates, visit weather.gov.