RANCHO PENASQUITOS, Calif. (KGTV) - Fire crews were called to Black Mountain Open Space Park amid the regions hot weather to rescue a woman who became dehydrated while hiking.

San Diego Fire and Rescue crews were called to the popular hiking destination just before 3 p.m. Tuesday to rescue the 45-year-old woman. A helicopter and ground crews were called to help.

RELATED: San Diego heat wave: Potentially record-setting temperatures possible

The hiker had gone hiking alone and became dehydrated, according to officials. The hiker also called her friend who rushed to the park with water and stayed with her until help arrived.

The woman's condition is unknown. She was brought to a nearby hospital.

No further information was immediately released.

RELATED: 10News weather forecast

SDFR reminds San Diegans to avoid hiking during the intense heat gripping San Diego County.

Excessive heat warnings and heat advisories throughout the county will remain in effect through Friday, Sept. 1, according to the National Weather Service.

Three Sisters and Cedar Creek falls hiking trails will also be closed through Friday due to the extreme heat, according to NWS.