Saw this on my way to work this morning…thought the building was building demolished (finally), but not, fire did the work and the fire crew was still there. Remains were still smoldering and the air was fragrant with the smell of char. Don’t know any other details. 
Here’s the story as the Star News reported:
if(requestedWidth > 0){ document.getElementById(‘articleViewerGroup’).style.width = requestedWidth + “px”; document.getElementById(‘articleViewerGroup’).style.margin = “0px 0px 10px 10px”; } ALTADENA – Firefighter crews battled for more than three hours this morning to extinguish a blaze at an abandoned building, officials said.The fire started just after midnight at the vacant Washington Mutual bank in the 2200 block of Lake Avenue.
Firefighters doused the flames at about 4 a.m.
A homeless man who was living inside the abandoned building was treated for smoke inhalation, Los Angeles County Fire Department officials said.
The cause of the fire is still under investigation.
Altadena Above It All 
March 5, 2008 at 1:14 am
as you real altatunans know, that ain’t just some wamu building — before it was republic federal, it was ALTADENA federal in the ’50s and ’60s — don’t know much of its history but it was a locally owned savings and loan.