It requires high index of suspicion and a good history taking in appropriate months for the<unk> .
The triage would tell how much evaluation is needed. Starting from ABC's.
Usually the<unk>  rash and<unk>  edema will not need any further investigation. But for more serious exposure and in right clinical settings, the following labs may be justified.
CBC with differential.
Serum chemistries.
BUN
Creatinine.
Blood CPK.
Urine analysis
EKG
Other investigation to rule out important differential may be needed as per treating physicians discretion.
Heat wave
Malaria
Heat edema
Liver abscess
Caustic cocktail
Sepsis
Cement burn
Meningitis