The investigation of the Sunday fire in Union Beach that cost a volunteer firefighter his life remains open today while members of the tightly-knit Bayshore community contemplate their loss.

Robert Meyer, 54, suffered cardiac arrest while battling the furious flames and smoke erupting from HayrAir, Inc., on Union Avenue. The inferno reached four alarms before firefighters got the upper hand.

Reports out today say that Meyer was a Superstorm Sandy survivor who lost his house in October 2012, and had only last week finally moved into a renovated house for the first time since the disaster.

Investigators continue to search for the point of origin and cause. They're asking anyone with information that can help them to call Detective John Liebfried of the Monmouth County Prosecutor's Office, 1-800-533-7443; or Union Beach Police Detective Chris Tuberion, 732-264-0313.

The first response to the blaze was logged at 5:56 PM.  Meyer, of Union Hose Fire Company Number 1, was pronounced dead at 7:17 PM at Bayshore Community Hospital, according to information from the office of acting Monmouth County Prosecutor Chris Grammiccioni. Four other firefighters were given precautionary treatment at the medical center.

As the fire escalated, squads from Middletown, Hazlet, Keansburg, East Keansburg, North Centreville, Holmdel, and Red Bank fire companies poured in.

Monmouth County and New Jersey state investigators are working in the aftermath, along with county and Highlands emergency management personnel and county public works staffers.