Table 1 Definition and categorization of hot, dry, and windy events (HDWs) based on different studies.
Classification | Temperature (°C) | Relative humidity (%) | Wind speed (m/s) | References |
|---|---|---|---|---|
1 | > 29 | < 30 | – | Lydolph and Williams11 |
2 | 29–37 | < 30 | < 7 | |
3 | 29–37 | < 30 | ≥ 7 | |
4 | ≥ 38 | < 30 | < 7 | |
5 | ≥ 38 | < 30 | ≥ 7 | |
– | > 35 | < 30 | ≥ 7 | Leathers and Harrington9 |
Slight | > 32 | < 30 | > 2 | Wang et al.12 |
Severe | > 35 | < 25 | > 3 | |
– | > 30 | < 30 | > 2 | |
Light | ≥ 32 | ≤ 25 | ≥ 3 | Shi et al.53 |
Heavy | ≥ 35 | ≤ 30 | ≥ 3 |