California, 2017

Excessive Heat in California, June 17 to 23, 2017

June 17 to 23, 2017 · NWS STO · 4 events in 2 counties and zones

High pressure ridging brought an unusually long and strong heat wave for the month of June, with a remarkable 24 new record high temperatures and 16 record high minimum temperatures being set in the area. At the peak of the heat wave on the 21st, Redding reached 112, Red Bluff 113, Marysville 112, downtown Sacramento 108 and Stockton 108.

The toll

Deaths
10
Injuries
2
Property damage
None recorded
Crop damage
None recorded
Events
4

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 STO wrote it up.

High pressure ridging brought an unusually long and strong heat wave for the month of June, with a remarkable 24 new record high temperatures and 16 record high minimum temperatures being set in the area. At the peak of the heat wave on the 21st, Redding reached 112, Red Bluff 113, Marysville 112, downtown Sacramento 108 and Stockton 108. A heat related fatality was reported in Sacramento County, two in Glenn County, as well as multiple people hospitalized due to the heat. There were nine cooling centers opened at the peak of the heat event in Sacramento County. Several power outages were reported at a hospital in Sacramento, and one roadway may have had damage due to the heat.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Sacramento, CA wrote its last area forecast discussion before the first event at Jun 16, 2:43 PM PST, 9 hours 17 minutes earlier.

Area forecast discussion, Jun 16, 2:43 PM PST, 9 hours 17 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Event by event

4 excessive heat. Local standard time, as filed.

Excessive Heat, Central Sacramento Valley

When
June 17, 12:00 AM PST to June 23, 12:00 AM PST
Where
Central Sacramento Valley forecast zone
Deaths
2 direct, 0 indirect
Injuries
2 direct, 0 indirect
Reported by
County Official

Glenn County had 4 heat related hospital visits, with two fatalities where heat was a contributing factor, along with hypo-tonic dehydration. One of the fatalities was located in a mobile home without air conditioning, found on 06/17/2017 at 1926 PDT. The temperature of the house was over 100 inside. The other individual was located outside, in an orchard, found on 06/20/2017 at 1816 PDT. This person was not homeless. An Excessive Heat Warning was in effect for the area. High temperatures in downtown Sacramento were 111 on the 18th (record), 113 on the 19th (record), 110 on the 20th (record), 110 on the 21st (record), 110 on the 22nd, 109 on the 23rd, and 112 on the 24th.

Excessive Heat, Southern Sacramento Valley

When
June 18, 12:00 AM PST to June 23, 12:00 AM PST
Where
Southern Sacramento Valley forecast zone
Deaths
4 direct, 2 indirect
Reported by
County Official

The Sacramento County Coroner reported a total of 6 heat related deaths in the county. One victim was a 88-year-old woman found outside her home in Elk Grove on June 16th. She had been doing yard work. Her air conditioner was on inside her residence. Another decedent was a 36 year old male found collapsed behind his residence in the city of Sacramento on June 19th. Cause of death was hyperthermia due to environmental heat exposure in combination with acute methamphetamine intoxication. He died at Sutter Medical Center. Another decedent was a 53 year old male found unresponsive on Two Rivers Trail at N. 7th Street in the city of Sacramento on June 21st. Cause of death was hyperthermia due to environmental heat exposure in combination with acute methamphetamine intoxication. He died at Sutter Medical Center. Another decedent was a 56 year old male that collapsed in his home on June 22nd in the city of Sacramento. it is unknown if his air conditioner was broken, but no air was on when he was found. He’d made statements to family that he was hot, but refused to accept help. He died at Kaiser Hospital South. Another decedent was an 89 year old female with extensive medical history that was found unresponsive in her home on June 20th in the city of Sacramento. Decedent had an air conditioner. It is unknown if it was broken or just turned off. She died after an extended stay at Kaiser Hospital South from heat stroke. Another decedent was an 83 year old female with extensive medical history that was found unresponsive on June 20th in her home in the city of Sacramento. She had air conditioning, but it was turned off. She died at after an extensive stay at Sutter Medical Center. Cause of death was hyperthermia due to heat stroke. | |An Excessive Heat Warning was in effect for the area through the period. High temperatures in downtown Sacramento were 106 on the 18th (record), 107 on the 19th (record), 106 on the 20th, 106 on the 21st, and 108 on the 22nd (record).

Excessive Heat, Southern Sacramento Valley

When
June 18, 12:00 AM PST to June 19, 12:00 AM PST
Where
Southern Sacramento Valley forecast zone
Deaths
1 direct, 0 indirect
Reported by
Department of Highways

Triple-digit heat was to blame for Highway 50 eastbound section buckling on Sunday, June 18th near the Jefferson Boulevard exit in West Sacramento. On June 19th Caltrans crews were out again to make repairs as more cracking/buckling closed the number 3 and 4 lanes well into the evening. High temperatures in downtown Sacramento were 106 on the 18th (record), and 107 on the 19th (record).

Excessive Heat, Southern Sacramento Valley

When
June 18, 12:00 AM PST to June 23, 12:00 AM PST
Where
Southern Sacramento Valley forecast zone
Deaths
1 direct, 0 indirect
Reported by
Emergency Manager

A Sacramento hospital suffered power outages when two different transformers were blown. This caused a postponement of elective surgeries and required the purchase and rental of fans, coolers and other equipment. High temperatures in downtown Sacramento were 106 on the 18th (record), 107 on the 19th (record), 106 on the 20th, 106 on the 21st, and 108 on the 22nd (record).

The people who died

As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.

EventDateAgeSexWhereKind
Excessive Heat, Central Sacramento Valley2017-06-20MaleMobile/Trailer HomeDirect
Excessive Heat, Central Sacramento Valley2017-06-17MaleUnder TreeDirect
Excessive Heat, Southern Sacramento Valley2017-06-1953MaleOutside/Open AreasIndirect
Excessive Heat, Southern Sacramento Valley2017-06-1956MalePermanent HomeDirect
Excessive Heat, Southern Sacramento Valley2017-06-2089FemalePermanent HomeDirect
Excessive Heat, Southern Sacramento Valley2017-06-2083FemalePermanent HomeDirect
Excessive Heat, Southern Sacramento Valley2017-06-1888MaleOutside/Open AreasDirect
Excessive Heat, Southern Sacramento Valley2017-06-1936MaleOutside/Open AreasIndirect
Excessive Heat, Southern Sacramento Valley2017-06-1888MaleOutside/Open AreasDirect
Excessive Heat, Southern Sacramento Valley2017-06-1888MaleOutside/Open AreasDirect

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 2017Every state in 2017This day in weather historyWarnings in California, June 2017

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 2026-09-30. Each event’s entry at NCEI: 702637, 700054, 700617, 700620.