🛟Public safety

three warning systems arriving on three different clocks, and two more that just told the public to un-believe something

The job today is lead time, and it is a different amount in every place on this list. In Japan there are three days before the rain reaches Kanto and hours before it reaches Ogasawara — which is time to stage pumps on the slopes that failed under the last two weeks of rain, not time to watch a track map. In the American Great Lakes and Ohio Valley the lead time is today, and it collapses to the oldest decision in the business: close the low-water crossing before a driver finds it. In northern Vietnam the lead time is gone — more than 2,000 homes are already submerged and more than 1,000 households isolated, so the work is access and resupply, not warning. And in Nigeria the change is what people should stop watching: with the dam impounding at 209.82 m of 216, the trigger is rainfall on a loaded basin, and a community told to watch a release date is a community watching the wrong thing. South Africa shows the mirror image — the coastal orange came down while an Orange level 5 went up inland, and the duty roster has to move with it. The person at the end of every one of these chains is deciding whether to move tonight or wait an hour.

carried on 39 of the last 65 editions — since Jul 18, the 10 most recent shown.