With blood supplies already at post-holiday lows and especially further depleted by the demand in the aftermath of the Metrolink train crash yesterday, Glendale Memorial Hospital will be holding an emergency blood drive today from 12:30 to 6:30 p.m. at the hospital’s main auditorium at 1426 S. Central Avenue. For more information, call 818/502-2378 or 818/917-9913. When I called I was told they weren’t making appointments, but to just come on down and be sure to bring a valid picture ID. There’s also the Glendale Chapter of the American Red Cross at 1501 S. Brand Blvd. at 818/243-3121.