Lambton OPP said the death is not being treated as suspicious.
The Canadian alternative rock band has received multiple Juno Awards and Much Music Video Awards, and is currently on tour to promote its new album "The Adventures of Ben Blank."
Renovations could start on a new emergency department as early as 2025.
The funds will go towards a therapeutic sensory room and accessibility improvements, including an automatic door, at St. Clair Child and Youth.
The St. Clair Catholic District School Board (SCCDSB) recently launched the fundraiser in collaboration with Conseil Scolaire Catholique Providence (CSC Providence).
Flags were lowered to half-mast on Friday in memory of Don Welten.
A new program is launching in Sarnia-Lambton and Chatham-Kent to connect children five and under to primary care.