Hazmat spill from overturned 18-wheeler shuts down SH-99 near San Jacinto River. What drivers need to know and alternate routes.
MONTGOMERY COUNTY, Texas — A hazmat spill involving an overturned 18-wheeler is blocking all main lanes along Grand Parkway in Montgomery County early Monday, creating a major disruption for drivers in the area.
According to Houston TranStar, the crash happened on the westbound lanes of the SH-99 Lanier/Grand Parkway at the San Jacinto River. The incident was verified at 2:04 a.m.
Authorities say the situation involves an 18-wheeler and a fuel spill, with all main lanes and both shoulders currently impacted. Drivers should expect significant delays and use caution if traveling through the area.
No timeline has been provided for when the roadway will reopen.
Alternate routes for drivers
Drivers looking to avoid the affected stretch of SH-99 may consider the following options:
- Exit before reaching the San Jacinto River and use nearby frontage roads where available
- Use FM 1314 as an alternate north-south route through the area
- Consider taking I-69/US-59 as an alternate corridor to bypass this portion of the Grand Parkway
This remains an active traffic situation. Drivers are urged to plan ahead and expect delays in Montgomery County as crews work to clear the scene.