February 21, 2026 6:32 AM

White Powder spilled across Southbound I-15 Lanes, Caused a Traffic Nightmare

CAJON PASS, CA. (Pain In The Pass) >> A hazardous-materials spill on southbound Interstate 15 initially caused a scare Wednesday morning but turned to be a major problem for commuters. (Photo above is credit by Detrice Wilson)

About 9:45am, a truck lost a pallet of a white powdery substance maybe bags of concrete, limestone, or bags of gypsum powder on southbound I-15 just before the Glen Helen Parkway exit. When at least 20 bags on a truck fell off and dumped all over the lanes, said the California Highway Patrol.

Caltrans said they called for a major cleanup response after the bags of the white powder created a large white cloud of dust, that looked like smoke.

CHP issued a Sig-Alert for multiple hours for all southbound I-15 lanes at 10:15am. They called for a sweeper to pickup the white powder about one inch deep in spots in the traffic lanes.

About at 3:30pm Caltrans was able to open the slow lane and the #3 lane. Then at 4pm they were able to reopen all the lanes.

It looks like the driver of the truck didn’t appear to stick around, and instead left his mess across the freeway. CHP said they could have cited the driver for not properly secure the load.

We will update this story with more information when the CHP’s preliminary incident report is available. Additional details were limited at this time. This incident will be under investigation by the California Highway Patrol, Inland Office.

There are more ways to follow the Pain In The Pass. Join the Traffic Group on Facebook with over 144,000 members. Join the group on MeWe. Like us on the NEW page on Facebook. Follow us on NewsBreak, and also follow us on Instagram, Threads, and X aka Twitter.

loader-image
Cajon Pass
6:32 am, Feb 21, 2026
temperature icon 30°F
clear sky
Humidity: 63 %
Pressure: 1022 mb
Wind: 4 mph
Wind Gust: 5 mph
Clouds: 0%
Visibility: 10 km
Sunrise: 6:28 am
Sunset: 5:38 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure
7:00 am
temperature icon
30°/30°°F 0 mm 0% 5 mph 63% 1023 mb 0 mm/h
10:00 am
temperature icon
36°/47°°F 0 mm 0% 5 mph 57% 1023 mb 0 mm/h
1:00 pm
temperature icon
46°/54°°F 0 mm 0% 4 mph 42% 1022 mb 0 mm/h
4:00 pm
temperature icon
49°/49°°F 0 mm 0% 6 mph 32% 1021 mb 0 mm/h
7:00 pm
temperature icon
43°/43°°F 0 mm 0% 4 mph 45% 1024 mb 0 mm/h
10:00 pm
temperature icon
44°/44°°F 0 mm 0% 4 mph 44% 1025 mb 0 mm/h
1:00 am
temperature icon
42°/42°°F 0 mm 0% 5 mph 44% 1025 mb 0 mm/h
4:00 am
temperature icon
39°/39°°F 0 mm 0% 5 mph 46% 1026 mb 0 mm/h