Beginning the morning of February 15, 2021, Winter Storm Uri dropped Houston into a five-day freeze that knocked out power to 91 percent of Harris County residents for an average of 49 hours. The University of Houston closed its main and satellite campuses through Saturday, February 20, suspended all in-person and online instruction, and warned residential students of the citywide boil-water notice that affected more than 13 million Texans. UH-affiliated MD Anderson and UTHealth campuses also paused operations including vaccination clinics.
Some messages in this sequence are documented (their existence, timing, and channel are sourced) but their exact wording is not preserved in the public record. Those entries appear as placeholders; only confirmed text is displayed.
UH Shifting to Remote Operations
University of Houston including UH at Sugar Land and Katy will operate on a fully remote schedule Monday and Tuesday, Feb. 15-16, 2021, due to forecast winter precipitation and hazardous travel conditions. Online classes will continue as scheduled and in-person classes will transition online at their regularly scheduled times. UH will continue to monitor forecasts and make adjustments should hazardous conditions extend beyond Tuesday. We hope you and your families remain safe during this time. Updates can be found at alerts.uh.edu
Exact rftContent from UH ALERT API (2021-02-12 17:19:00)
PR7 correct: re-pointed sourceUrl from wrong 2022 id 2446967422587581 to matching Uri remote-ops email id 817216312316818; text aligned to API rftContent
INITIAL ALERTEmail+1d
Wording not preserved
A initial alert message is documented at this point in the sequence, but its exact wording is not preserved in the public record. The public edition displays only confirmed alert text.
UH Closed Monday-Tuesday, Feb. 15-16, 2021
The
University of Houston including UH at Sugar Land and Katy is closed through Tuesday, Feb. 16, 2021, due to power and operational outages associated with the winter storm. All classes and activities are canceled. We hope everyone is able to stay safe and warm. Updates will be posted at alerts.uh.edu.
Exact rftContent from UH ALERT API (2021-02-15 08:35:26)
PR7 correct: sourceUrl was wrong 2022 id; set to Feb 15 closure id 816941434413865 and exact rftContent
UH Closed through Thursday, Feb. 18, 2021
The
University of Houston including UH at Sugar Land and Katy is closed through Thursday, Feb. 18, 2021, due to power and operational outages associated with the winter storm. All classes and activities are canceled. We hope everyone is able to stay safe and warm. Updates will be posted at uh.edu/emergency
Exact rftContent from UH ALERT API (2021-02-16 12:09:27)
PR7 correct: sourceUrl was wrong 2022 id; set to id 817353751274757
City of Houston Issues Boil Water Notice
A boil water notice is now in effect for the city of Houston until further notice. The UH central plant, which supplies steam to heat buildings and hot water throughout campus cannot operate within the low water pressure currently being experienced throughout Houston. The University is working to distribute essential accommodations to campus. Limited food service is being provided and we are working on deliveries of bottled water and portable toilets to campus.
Under the Boil Water Notice, tap water is unsafe to drink. Water for drinking, cooking and ice making should be boiled and cooled prior to use for human consumption purposes.
All University classes and activities are cancelled through Thursday, Feb. 18, 2021, including UH at Sugar Land and UH at Katy.
Our Emergency Operations team and department liaisons are addressing issues as they arise, to the extent possible. We appreciate your patience as well get through this unprecedented winter weather situation together.
The University will provide updates on this developing situation at www.uh.edu/emergency.
Exact rftContent from UH ALERT API (2021-02-17 10:45:48)
University of Houston Remains Closed Through Saturday, Feb. 20
All University classes and activities are canceled through Saturday, Feb.
20, including UH at Sugar Land and UH at Katy.
A
boil water notice is now in effect for the city of Houston until further notice. Under
the Boil Water Notice, tap water is unsafe to drink.
The UH central plant, which supplies steam to heat buildings and hot
water throughout campus cannot operate within the low water pressure/water
outage being experienced throughout Houston. The city has reported it
expects water pressure to be restored as early as the end of the day or
tomorrow. UH will restore central plant operations as soon as conditions
allow.
Limited food service is being provided to student residents and we are
distributing bottled drinking water and portable toilets to campus as
supplies becomes available.
Our Emergency Operations Center and department liaisons are addressing
issues as they arise, to the extent possible.
The University will provide updates on this developing winter weather
situation at
www.uh.edu/emergency
Exact rftContent from UH ALERT API (2021-02-17 18:14:41)
UPDATEEmail+7d
Wording not preserved
A update message is documented at this point in the sequence, but its exact wording is not preserved in the public record. The public edition displays only confirmed alert text.
UH including UH Sugar Land and Katy reopens Monday, Feb. 22, 2021. See www.uh.edu/emergency
Verbatim SMS textMessage from UH ALERT official API (alerts.uh.edu/api/v2/uh/all)
API startDate 2021-02-21 17:14:50
PR7 correct: re-pointed from id 823401065224720 (16:30) to id 823675943133704 (17:14:50) matching case timestamp; SMS text identical except leading-space variant on earlier id
PR7 correct: reopen SMS paired to id 823401065224720 (2021-02-21 16:30:21); 17:14 twin is near-duplicate SMS resend
UH reopens Monday, Feb. 22, 2021
The University of Houston including UH at Sugar Land and Katy, will resume pre-winter storm operations Monday, February 22, 2021. At this time, only UH at Katy remains under a boiled water notice. Any updated information will be available at www.uh.edu/emergency
Sent Monday morning February 22, 2021 -- after the Sunday February 21 evening lifting of the City of Houston boil-water notice
Eight calendar days after the initial closure began on February 15 -- among the longest weather-related closures in UH's history
Hobby School subsequently published the most-cited academic study of Winter Storm Uri's impact on Texans, using survey data collected from February 22 through early March 2021
Houston's water system would take additional weeks to fully recover; some buildings had pressure issues into March
Verbatim from UH ALERT official API: email body reopen Feb 22
PR7 correct: sourceUrl was wrong 2022 id; set to reopen email id 823401065224720 (2021-02-21 16:30:21) matching Katy boiled-water footer
Message elements
How the first alert is built
To check this alert, Claude (an AI) read it in full 25 separate times, independently. Each read decided whether the message answers each of the six questions and gave a short reason. A final reviewer then weighed all 25 and wrote the plain-English verdict you see when you open a row. The score (for example 22/25) is how many reads agreed; the 25 individual reads are tucked underneath if you want to check them.
UH is moving to remote operations Mon-Tue. See www.uh.edu/emergency
Sourceabsent0/0
Who is sending the alert and who is responding. People act faster on a message from a clearly identifiable, credible sender, such as a named department, the police, or a branded alert system, than on an anonymous notice. A branded signature counts.
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Open to load the 25 reads.
Hazardabsent0/0
What the threat actually is. A complete warning names the specific danger, such as a shooter, a fire, a tornado, or a gas leak, rather than a vague emergency, because people decide what to do based on what they are facing.
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Locationabsent0/0
Where the threat is. Saying whether danger is in a specific building, a part of campus, or area-wide lets people judge their own proximity and choose a safe direction. Without a where, a warning is hard to act on precisely.
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Guidanceabsent0/0
The protective action to take. A clear, specific instruction, such as shelter in place, evacuate, avoid the area, or run-hide-fight, drives faster and more correct protective behavior than describing the threat alone.
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Timeabsent0/0
When the message applies. A timestamp, the word now or immediately, or a phrase like until further notice tells the reader whether the danger is current and how quickly to act.
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Impactabsent0/0
What the hazard could do to the people in its path. Beyond naming the threat, a complete warning conveys its potential consequences or severity, such as that a tornado can level buildings or that a leak could be explosive, so recipients grasp how much danger they are in. Research on warning message content finds that a concrete impact statement helps people personalize their risk and act sooner.
See all 25 individual reads
Open to load the 25 reads.
Systematic AI judgments with visible reasoning, not human-validated codings.
On February 14, 2021, with Winter Storm Uri forecast to bring an Arctic outbreak unseen in Houston since 1989, the University of Houston announced initial closures through February 17. The storm arrived overnight, and within 36 hours the ERCOT power grid had failed across most of the state. UH's Hobby School of Public Affairs later documented that 91 percent of Harris County residents lost power at some point during the storm, with an average outage of 49 hours. The City of Houston issued a boil-water notice on February 17 after its main water treatment plant lost power; the notice affected more than 13 million Texans regionally and would not be lifted until February 21. UH extended its closure three times -- ultimately reopening on Monday, February 22. Statewide, more than 240 deaths were attributed to the storm. The Hobby School subsequently authored the most-cited academic assessment of Winter Storm Uri's impact on Texans, using survey data gathered from UH community members and the broader Houston region.
Analysis
Key Findings
01Seven-day campus closure (February 15 through February 21, 2021) -- among the longest weather-related closures in UH's history
0291 percent of Harris County residents lost power at some point during the storm -- average outage of 49 hours
03City of Houston boil-water notice (February 17-21) affected more than 13 million Texans regionally
04UH canceled online classes in addition to in-person -- unusual but reflective of widespread power and internet outages
05UH's Hobby School subsequently produced the most-cited academic assessment of Winter Storm Uri's human impact
Outcome
The University of Houston extended closures three separate times before reopening on Monday, February 22, 2021. Statewide, [more than 240 deaths](https://en.wikipedia.org/wiki/February_13%E2%80%9317,_2021_North_American_winter_storm) were attributed to the storm. UH's Hobby School of Public Affairs subsequently authored the leading [academic assessment of the storm's impact](https://www.uh.edu/news-events/stories/2021/march-2021/03292021-hobby-winter-storm.php). The storm exposed the inadequacy of Houston's water-treatment redundancy and the brittleness of the ERCOT power grid for higher-education operations.
Campus Alert Archive. "University of Houston: Winter storm, February 15, 2021." Incident of February 15, 2021. Added May 2026; last updated July 2026. https://campusalertarchive.com/case/university-of-houston-winter-storm-uri-2021-02-15/