Boards on doors and windows create challenges for fire crews in London, Ont.

Firefighters work at a structure fire on Hamilton Road in London, Ont. on Monday, Oct. 25, 2021. (Gerry Dewan / CTV News) Firefighters work at a structure fire on Hamilton Road in London, Ont. on Monday, Oct. 25, 2021. (Gerry Dewan / CTV News)