In the context of global climate change, the health impacts of heatwave events exhibit marked regional heterogeneity, posing a severe threat to public health. This study analyzed daily respiratory disease outpatient data, meteorological monitoring data, and air pollution data from Handan City (2016~2021) using a Generalized Additive Model (GAM) to evaluate the risk of respiratory disease visits under 12 heatwave definitions (based on P96-P99 percentile thresholds lasting 2~4 days). Results demonstrate significant definition-dependent variability in heatwave frequency and duration: extreme heatwaves (P99 threshold, 4days) occurred only twice (9 cumulative days) over six years, while moderate heatwaves (P96 threshold, 2days) reached 20 occurrences (66 cumulative days). During heatwave periods, temperatures were significantly higher with reduced variability compared to non-heatwave periods, accompanied by statistically significant differences in daily outpatient volumes.Forheatwaves lasting 2~3 days, health risks initially increased and then decreased with rising intensity, whereas for events lasting 4 days, risks progressively declined with increasing intensity. Peak risks for P96-P98-defined heatwaves occurred at lag 3~5 days, while P99-defined extreme heatwaves showed immediate peak risks at lag1day. Long-duration heatwaves ((4days) posed significantly higher and more prolonged risks compared to short-duration events ((2days). All heatwave types exhibited a "bimodal lag pattern" with acute (lag 0~3) and delayed (lag 5~7) effect phases. The risk profile for low-intensity, short-duration heatwaves was relatively stable, whereas high-intensity, long-duration events demonstrated greater risk fluctuations. These findings provide regionally tailored evidence to inform the development of dynamic heatwave health early warning systems.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |