Per the Altadena Sheriff station, the rescue squad is getting a workout tonight.

Altadena Search and Rescue successfully brought down two hikers earlier tonight from the Millard Canyon/Chaney Trail area, who were caught without flashlights as it got dark. 

And, about 10 PM, the watch commander tells us that they're preparing for a rescue of a hiker in Eaton Canyon who has not returned.  Pasadena PD is also involved, but not many details at this time.