Residents of two suburbs near the US city of Houston were warned to "shelter in place" for much of Thursday morning after elevated levels of a volatile chemical were detected following an industrial plant fire. The Texas cities of Deer Park, where the Intercontinental Terminals Company (ITC) plant is located, and Galena Park both issued the alerts, which were lifted by early afternoon. "Early this morning, certain air quality readings were found to be above our very conservative air quality standards," said Lina Hidalgo, the chief executive of Harris County where Houston and its suburbs are located.
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