Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
1
Is any of this happening now?
Call 911
Call emergency services now if someone has trouble breathing, becomes confused or unresponsive, has a seizure, or collapses.
These symptoms may occur with severe overheating or another serious problem.
Do not delay emergency care when there is confusion, fainting, or a seizure.
These usually need assessment but are not automatically emergencies.
Other emergency signs, for anyone
Someone who is struggling to breathe, gasping, choking, or cannot get words out
Someone who has chest pain, tightness or pressure lasting more than a few minutes
Someone who has sudden weakness or drooping on one side of the face or body, slurred speech, or sudden confusion
Someone who is unconscious, or cannot be woken
Someone who is bleeding heavily and it will not stop with firm pressure
Someone who has had a seizure that will not stop, or does not wake up afterwards
Someone who has lips or skin that look pale, blue, grey or blotchy
Someone who you believe has taken an overdose or swallowed something poisonous
2
Is any of this happening?
Be seen today
Get urgent medical advice for:
Eye pain, strong light sensitivity, or a sudden change in vision
Spreading redness, swelling, pus, or fever with a skin wound
Inability to drink or keep fluids down
A baby who is struggling to feed, choking, or not gaining weight
Signs of overheating that do not improve quickly with cooling
3
Does any of this apply?
Book an appointment
Arrange routine follow-up for new dental pain, changes in hearing, repeated ear or eye infections, worsening skin problems, speech concerns, or difficulty managing heat.
The article also says
Move a person with possible overheating to a cooler place while arranging help.
Remove unnecessary outer clothing and begin safe cooling if possible.
Every sign above is quoted from the sofidex article on Rapp Hodgkin syndrome. If you are not sure, err upward — it is always reasonable to be checked.