Web alarm clock for 12:48 p.m.
While preparing early for the evacuation-centre roll call, you can set the alarm for 12:48 pm and use the remaining time to arrange your list, pen, and assigned groups. That leaves the check itself ready to begin before 1:00 pm, without relying on someone to keep watching the clock.
Your roll call depends on hearing the alert where you will actually be working, so test the volume and keep the browser audible after setting the time. If the device falls asleep before 12:48 pm or the page is closed, the alarm may not sound, which could delay the roll call. Keep the device awake, connected to power if needed, and close enough for the alert to be heard over conversations inside the centre.
As people gather around midday in the Philippines, place the roll-call point where staff can speak clearly without leaving everyone under direct sun. Humid outdoor air can make a covered, open-sided area more practical than a sealed corner, especially when the group is waiting. Keep paper lists in a folder or clipboard, and choose a spot away from sudden rain while still allowing air to move through.