Houston Mayor Sylvester Turner said the water was safe and the boil order was done to comply with regulations. He tweeted that the city submitted its plan to TCEQ to lift the notice Sunday night.

\"Water samples will subsequently follow and hopefully we will get the all clear from TCEQ. The city has to wait 24 hours from that point before the boil water notice is suspended,\" Turner said.

\"PHOTO:
Mark Mulligan/Houston Chronicle via AP
PHOTO: The East Water Purification Plant after a boil water notice was issued for the entire city of Houston, Nov. 28, 2022, in Houston.
>

The incident had a ripple effect on other city services and organizations.

Houston schools were closed Monday and Tuesday because of the order.

\"We will closely monitor the situation and provide additional updates about operations for Wednesday,\" Houston's Independent School District tweeted Monday afternoon.

\"PHOTO:
Mark Mulligan/Houston Chronicle via AP
PHOTO: People shop for bottled water after a boil water notice was issued for the entire city of Houston, Nov. 27, 2022.
>

Yvonne Williams Forrest, Houston's water director, told ABC affiliate KTRK Sunday night the city's pressure system was below the regulatory limit.

\"There are a number of steps in the regulatory process before you issue a boil water notice and we didn't want to unnecessarily alert the city if we did not have to issue a boil water notice,\" she told KTRK.

Turner said the power outage was caused by two transformers that malfunctioned. Power was restored Monday around 12:15 p.m. local time, he said.

\"PHOTO:
Brandon Bell/Getty Images
PHOTO: In an aerial view, the East Water Purification Plant is seen on Nov. 28, 2022 in Galena Park, outside Houston, Texas.
>

The mayor said 16 sensors fell below 20 PSI for two minutes, triggering the emergency, and full water pressure was restored above 20 PSI at 14 of the 16 locations.

Turner said the incident will be investigated and he apologized to the city, schools and parents for the cancellations.

\"I can't tell you why it failed, stuff does happen and it's unfortunate,\" he said.

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