Overturned 18-wheeler shuts down westbound SH-99 Grand Parkway near Cypress Rosehill, Life Flight responding

A major crash involving an overturned 18-wheeler has shut down part of the westbound SH-99 Grand Parkway near Cypress Rosehill, according to authorities.

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The crash was reported on the westbound lanes of SH-99 at Cypress Rosehill.

Officials said the crash involved a single concrete truck, and Life Flight has been called to the scene.

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Hazmat crews and other first responders are on the scene, and cleanup is expected to take one hour.

Drivers are urged to avoid the area and find an alternate route, as significant traffic delays are expected.