Air quality advisory issued as heat wave hits Southern California

Temperatures climbed above 100 degrees in parts of the Antelope Valley and Los Angeles County mountains Sunday, as Southern California continued to bake under a long heat wave that is expected to see slight relief tomorrow.

The hot, dry weather was expected to increase fire danger in vulnerable areas.

"Increasing onshore winds combined with very warm temps and low humidity will bring elevated to brief critical fire weather conditions to interior areas through Tuesday, especially Hwy 14 corridor,'' the National Weather Service tweeted Sunday afternoon.

A heat advisory for the Los Angeles County mountains was set to expire at 9 p.m. Sunday.

Lancaster saw a high of 105 degrees Sunday, with a high of 102 forecast for Monday. In downtown Los Angeles, it was 87 Sunday, but Monday's high was expected to drop to 82. Pasadena was expected to drop from a high of 97 Sunday to 92 on Monday.

Temperatures will stay high throughout the week, but will stop short of triple digits except in parts of the Antelope Valley.

Sunday's air quality was unhealthy for all individuals in the East San Gabriel Valley, and unhealthy for sensitive individuals in the East San Fernando Valley, West and South San Gabriel Valley, Pomona/Walnut Valley, Santa Clarita Valley, and San Gabriel Mountains, according to the South Coast Air Quality Management District.

CNS contributed to this report