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SAN DIEGO — A driver was killed when she crashed into a semi-truck that jackknifed on the rain-slicked freeway in San Diego early Friday, authorities said.

The wreck left all northbound lanes of Interstate 15 closed between Adams Avenue and Interstate 8, Caltrans confirmed. Traffic was blocked for several hours, with the back-up reaching past University Avenue before authorities could open the lanes around 6 a.m.

The 27-year-old truck driver first lost control at about 2:20 a.m. on I-15 in the area of Normal Heights and Kensington, according to a California Highway Patrol news release. The large trailer swung out to one side and left the truck stuck blocking several northbound lanes.

A few minutes later, a 76-year-old woman driving a white Honda CRV came upon the wrecked trailer and couldn’t stop, hitting the big rig. The crossover got lodged under the trailer and it took firefighters about 40 minutes to free her, San Diego Fire Batt. Chief Mike McBride said.

The driver was taken to the hospital but pronounced dead from injuries suffered in the crash a short time later, according to CHP. Officials said her identity would not be shared publicly until her family could be notified.

The trucker was uninjured, CHP said. His big rig appeared to be hauling goods for Amazon, based on the advertising wrapped around the trailer.

Investigators were looking into the crashes and had not made any determinations on whether speed, DUI or other factors contributed to the fatal collision.

Officials urged drivers to use caution Friday during the first of two rainstorms over San Diego County. Forecasters said the heaviest rain started Thursday night and continued into the early morning, when the crash occurred.

Throughout the storm, you can track conditions with FOX 5’s San Diego weather radar and live San Diego traffic map.