VANCOUVER -- Update: As of Monday morning, all school districts in the Lower Mainland had announced closures. Read more here. If you go to school in the Lower Mainland, chances are you won't be going to school on Monday. As of 7:30 p.m. on Sunday, every public school district in the Lower Mainland except for West Vancouver and Maple Ridge had announced that schools would be closed Monday due to extreme heat. The Surrey and Chilliwack school districts had also not made announcements, but their school years ended on Friday, according to district calendars. The rash of closures comes as most of B.C. remains under heat warnings amid a record-breaking heat wave.