California, 2018

Excessive Heat in California, June 21 to 23, 2018

June 21 to 23, 2018 · NWS PSR · 5 events in 5 counties and zones

A heatwave developed across parts of southern California, resulting in excessive heat warning conditions.

Where it happened

Every event with a place to put it; 5 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
5

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS PSR wrote it up.

A heatwave developed across parts of southern California, resulting in excessive heat warning conditions.

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

5 excessive heat. Local standard time, as filed.

Excessive Heat, Joshua Tree Np East

When
June 21, 5:00 PM PST to June 23, 4:00 AM PST
Where
Joshua Tree Np East forecast zone
Reported by
ASOS
Coordinates
34.841, -116.178 (the zone’s center; the record gives no point)

Excessive Heat, Imperial County West

When
June 21, 5:00 PM PST to June 23, 4:00 AM PST
Where
Imperial County West forecast zone
Reported by
ASOS
Coordinates
33.040, -115.365 (the zone’s center; the record gives no point)

Excessive Heat, Imperial Valley

When
June 21, 5:00 PM PST to June 23, 4:00 AM PST
Where
Imperial Valley forecast zone
Reported by
ASOS
Coordinates
33.040, -115.365 (the zone’s center; the record gives no point)

Excessive Heat, Chiriaco Summit

When
June 21, 5:00 PM PST to June 23, 4:00 AM PST
Where
Chiriaco Summit forecast zone
Reported by
ASOS
Coordinates
33.744, -115.994 (the zone’s center; the record gives no point)

Excessive Heat, Chuckwalla Valley

When
June 21, 5:00 PM PST to June 23, 4:00 AM PST
Where
Chuckwalla Valley forecast zone
Reported by
ASOS
Coordinates
33.744, -115.994 (the zone’s center; the record gives no point)

What these are

Excessive Heat
Heat at or above the local excessive heat warning criteria, or heat that caused deaths.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in California in 2018Every state in 2018This day in weather historyWarnings in California, June 2018

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 864411, 864413, 864414, 864415, 864416.