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Flash Flood Warning: Tucson and Phoenix Brace for Heavy Rain

9/27/2025

50 5 Full Breakdown

Summary

Story summary

Flash flood warning issued for Tucson on September 25, signaling life-threatening conditions on roads.
Rita Ranch rainfall reached 0.8–1.2 inches, fueling flooding in creeks and streams.
On September 26, Metro Phoenix experienced heavy rain and warnings.
National Weather Service reported cloud-to-ground lightning and hail up to 1.5 inches in Phoenix.
A low-pressure system from Southern California drives moisture across Arizona.

History

Historical Context

In 1983, Tucson faced severe flooding from heavy rainfall, causing over $100 million in damages and prompting National Weather Service warnings as rainfall reached 3.5 inches. This event highlighted the region's vulnerability to flash floods, a risk that persists today as similar weather patterns threaten infrastructure and lives, underscoring the need for enhanced emergency preparedness and resilient infrastructure.

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Story summary

Flash flood warning issued for Tucson on September 25, signaling life-threatening conditions on roads.
Rita Ranch rainfall reached 0.8–1.2 inches, fueling flooding in creeks and streams.
On September 26, Metro Phoenix experienced heavy rain and warnings.
National Weather Service reported cloud-to-ground lightning and hail up to 1.5 inches in Phoenix.
A low-pressure system from Southern California drives moisture across Arizona.

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