A second person has died following a propane explosion that destroyed a Long Island house, killing an 18-month-old boy and injuring more than a dozen others.

Patricia Salegna-Maqueda, 46, died last night at Stony Brook University Medical Center, police said.

She was a State Farm Insurance rep who was at the Brentwood home regarding a flooding claim.

Toddler Rah-Quan Palmer died instantly in the Aug. 14 explosion.