Web alarm clock for 9:21 a.m.
Before handing over the job, you set a 9:21 am alarm so the next person knows when to clear the storm drain grate ahead of the forecast downpour. That leaves enough room to point out the exact grate, show where the debris should go, and confirm who will handle it before 10:00 am.
During the handover, the alarm page may slip behind a weather forecast, a message thread, or another browser screen. It can keep counting there, but some browsers may delay or silence its alert when the page has been left in the background. Bring the alarm page forward again before the grate-clearing time. Also keep this page open and the phone awake; otherwise the storm drain grate reminder will not sound, and the blockage may still be there when the rain arrives.
When responsibility for the grate changes hands this morning, check whether the work area will still be easy to see at 9:21 am. Cloud cover can make a shaded roadside drain look dim even before rain starts. Position a torch where the incoming person can reach it without searching, or switch on the nearest safe outdoor light beforehand. Aim the beam across the grate rather than into someone’s eyes, so leaves, plastic, and mud remain visible during the quick inspection.