UPDATE (7:30 p.m.) - CalFire SLO says both horses are being treated by a local veterinarian.
The first horse extracted is responding well to treatment, the other - fire crews say it's too early to tell.
They hope to know more in the next 24-72 hours about the horse's condition.
CORRECTION (4:38 p.m.) - Officials cut interior parts of the horse trailer to help extricate the second horse. The roof was not removed, as initially reported.
UPDATE (11:49 a.m.) - Horse Emergency Evacuation Team (HEET) is assisting CAL FIRE SLO crew members on scene.
Crews used ropes to pull the sedated horse free from the overturned trailer. Veterinarians at the scene are waiting for the horse to wake up so they can determine the severity of the horse's injuries.
The first horse to be extricated is currently walking and eating.
The driver of the horse trailer said they were driving northbound on Highway 101 when they hit a bump, causing the horse trailer to fishtail and eventually skid. Afterwards, the trailer hitch broke and overturned, pinning one horse on the other.
UPDATE (11:08 a.m.) - A veterinarian arrived at the scene to sedate the second horse needing extrication so it does not get injured from the metal when crews cut the roof off the trailer.
Northbound Hwy. 101 at Spyglass in Pismo Beach. County Fire Rescue 21 with large animal rescue equipment requested to assist in extrication of two horses. pic.twitter.com/cJLnuwwSsf— CAL FIRE SLO (@CALFIRE_SLO) October 20, 2019
Traffic on the northbound side of Highway 101 near Spyglass Drive in Pismo Beach is still impacted.
ORIGINAL STORY (11:02 a.m.) - CAL FIRE SLO officials are extricating two horses from an overturned horse trailer on Highway 101 near Spyglass Drive in Pismo Beach Sunday morning.
One of the horses has a leg injury. There is no word yet on the second horse.
Officials responded to reports of the overturned trailer at nearly 10:30 a.m. Sunday.
CAL FIRE SLO tweeted there is heavy traffic near the site of the extrication.
The extrication for the second horse may take up to an hour.
This is a developing story. Check back later for more updates.