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| Signs and symptoms | Percentage (number) |
|---|---|
| Prodromal signs | |
| Thirstiness | 63.5% (92) |
| Heavy sweating | 60.0% (87) |
| Exhaustion | 59.3% (86) |
| Disturbed gait | 46.2% (67) |
| Visual field narrowing | 31.0% (45) |
| Vomiting | 27.6% (40) |
| Nausea | 22.8% (33) |
| Headache | 18.8% (27) |
| Lightheadedness | 14.5% (21) |
| Absence of sweating | 9.0% (13) |
| Central nervous system impairment | |
| Coma | 60.7% (88) |
| Confusion | 57.9% (84) |
| Seizures | 3.7% (6) |
