Key facts
- Alert
- Flash Flood Warning (severe)
- Issued by
- National Weather Service, Phoenix AZ
- Areas
- Maricopa, AZ
- Places
- Round Valley, Sugarloaf Mountain
- In effect
- until 12:00 AM MST, Nov 2, 2026
- Damage threat
- Considerable
- Detection
- Radar indicated
What the National Weather Service says
“This is a life threatening situation.”
NWS Phoenix AZ, Flash Flood Warning, 8:01 PM MST Nov 1, 2026 · official alert
“If you encounter flood waters...climb to safety.”
NWS Phoenix AZ, Flash Flood Warning, 8:01 PM MST Nov 1, 2026 · official alert
“Be especially cautious at night when it is harder to recognize the dangers of flooding.”
NWS Phoenix AZ, Flash Flood Warning, 8:01 PM MST Nov 1, 2026 · official alert
What to do
Stay away from the Sand Stone burn scar and the creeks, streams and ditches around it. The National Weather Service says this is a life threatening situation. If you encounter flood waters, climb to safety.
Do not drive into flooded roads or around barricades. Debris flows can cross roads, and roads and driveways may be washed away in places. Just 6 inches of moving water can knock you down, and 1 foot can sweep a vehicle away.
Be extra careful tonight. Flooding is harder to recognize in the dark. Move to higher ground if water starts to rise near you.
Context
The National Weather Service says excessive rain on a burn scar can cause debris flow, which can include rock, mud, vegetation and other loose materials. Burn scars can produce this kind of flooding quickly.
FEMA records show 2,643 flood insurance claims in Maricopa County from 1978 to 2026. That count covers only insured properties, so it understates total flood damage. FEMA's most recent flood declaration listed for the county is number 4203, for severe storms and flooding, dated 2014-11-05.
Updates
- The flash flood warning expired at 12:00 AM MST.
- NWS Phoenix AZ issued the flash flood warning until 12:00 AM MST.
History here
Maricopa County: 2643 flood insurance claims in FEMA's National Flood Insurance Program records since 1978, most recent 2026.
Maricopa County: recent federal disaster declarations
- DR-4203 (2014): severe storms and flooding
Get these alerts on your iPhone
Herebeat is an iPhone app that shows official alerts like these (National Weather Service warnings, earthquakes, wildfires, air quality and more) for the places you save, each with its source and issue time. Download Herebeat on the App Store.
Questions
- Is there a flash flood warning in Maricopa County, Arizona?
- Yes. The National Weather Service in Phoenix issued a Flash Flood Warning for the Sand Stone burn scar in Maricopa County at 8:01 PM MST. It runs until 12:00 AM MST.
- Which places are affected by the Sand Stone burn scar flash flood warning?
- The warning covers the Sand Stone burn scar area. The National Weather Service names Round Valley and Sugarloaf Mountain among the places that will experience flash flooding.
- How much rain has fallen on the Sand Stone burn scar?
- Radar indicated up to 1.25 inches of rain had fallen as of 801 PM MST. Up to 0.5 inches more is possible in the warned area.
Sources
- NWS Phoenix AZ: Flash Flood Warning, Nov 1, 2026 weather.gov
- FEMA OpenFEMA: NFIP claims and disaster declarations fema.gov
How this page is made. The Herebeat Hazard Desk builds event pages from official U.S. government data (National Weather Service, USGS, FEMA). The text is written with AI from that data; every number and quote is checked against the official source automatically before publishing, and the page is updated when the agency updates the event. The official source is always the reference. Spotted a mistake? info@herebeat.app. About the Hazard Desk.