Web alarm clock for 8:02 p.m.
You are getting ready early to secure the roof before the night wind arrives, so an alarm for 8:02 pm can mark the moment to bring out the rope, tarpaulin, and tools. Starting now leaves enough room to inspect loose sheets and exposed edges before 9:00 pm, rather than discovering unfinished sections after dark.
While you gather everything for the roof, keep the alarm on a device that will remain awake and nearby. Set it for 8:02 pm, check that the volume is audible over outdoor work, and leave the browser running. If the screen locks deeply or the browser is closed, the roof alarm may not sound, which could delay your preparations until the wind has already picked up. A separate phone alarm is a sensible backup.
Roof work in a Philippine evening can quickly run into fading light, so reserve part of the remaining time for packing up safely before your next task tonight. Put frequently used tools in one place, keep a torch within reach, and decide which section must be secured first. That buffer lets you stop at a clear point, check the fastenings from the ground, and clean the work area without rushing.