HWDSB once again offers vacant schools to the city for temporary shelter or medical use Hamilton's largest school board has renewed its offer for the city to use vacant schools for emergency shelter or medical centres during the pandemic. Social Sharing CBC News · Posted: Dec 10, 2020 8:32 AM ET | Last Updated: December 10, 2020 Physical distance markers line the hallways of Ancaster High Secondary School this year.(Bobby Hristova/CBC) Hamilton's largest school board has renewed its offer for the city to use vacant schools for emergency shelters or medical centres during the pandemic. Hamilton-Wentworth District School Board (HWDSB) trustees voted on Monday to remind the city that there are unused schools available.