Web alarm clock for 9:14 a.m.
You are halfway through clearing the storm-drain grate before the forecast downpour when the 9:14 am alarm tells you to stop and check your progress. Set it before you put your phone aside, so you have a firm break from the muddy work. That still leaves 46 minutes before 10:00 am to bag the leaves, rinse your tools, and make sure water has a clear path away from the street.
With traffic, neighbours, running water, or a nearby pressure washer in the background, the alarm may be easier to miss than expected. Raise the volume, choose a distinct sound, and keep the phone close enough to hear while you clear the grate. Test the signal once before returning outside. If the browser is no longer running or your phone goes to sleep, the alarm may not sound, so it should not be your only cue to leave the drain before rain arrives.
Once the grate is open, use the rest of the morning to move the collected silt into shade rather than leaving it on hot pavement. By 9:14 am in the Philippines, heat can build quickly, while stepping into strong air-conditioning with damp clothes may feel abrupt. Keep water nearby, finish the outdoor portion first, then cool down indoors and let your tools dry where they will not block the drain again.