Extreme Heat Warning Issued for Southwest Arizona & Southeast California Through Friday

The National Weather Service in Phoenix has issued an Extreme Heat Warning that remains in effect from 10 a.m. MST/PDT today through 8 p.m. Friday, October 9.

What’s happening:
Dangerously hot conditions are expected with afternoon temperatures of 104–110°F across western Imperial County, the Imperial Valley, and the Yuma area. This is 10–15 degrees above normal for early October and carries a Major Heat Risk. Overnight lows will offer limited relief.

Areas under the warning include:

• Imperial County West and Imperial Valley (CA)
• Yuma and surrounding areas (AZ)
• Portions of the Lower Colorado River Valley (expanded for Thursday)

Why this matters:
Extreme heat dramatically increases the risk of heat cramps, heat exhaustion, and heat stroke. Overexposure can escalate quickly—especially for outdoor workers, athletes, older adults, young children, and anyone without reliable access to air conditioning or shade.

Stay Cool. Stay Safe.

• Reschedule strenuous outdoor activity to early morning or evening when possible.
• Drink water regularly—don’t wait until you’re thirsty.
• Wear lightweight, loose-fitting clothing.
• Take frequent breaks in shade or air-conditioned spaces.
• Never leave children or pets in vehicles.
• Know the signs of heat illness: heavy sweating or no sweating, confusion, dizziness, nausea, rapid pulse, or collapse.

If heat stroke is suspected: Cool the person immediately (cold-water immersion is best when available) and call 911. Cool first. Transport second.

Public cooling centers may be available—check with local county officials.

This unseasonably intense October heat is a reminder that heat risk doesn’t end with summer. Stay informed, stay prepared, and help protect those around you.

Source: National Weather Service Phoenix / KESQ report, October 7, 2026.