Symptoms of heat stroke include:

Confusion, altered mental status, slurred speech.

Loss of consciousness (coma).

Hot, dry skin or profuse sweating.

Seizures

Very high body temperature.

Fatal if treatment delayed.

Read more at: https://www.cdc.gov/niosh/topics/heatstress/heatrelillness.html#:~:text=Heat%20stroke%20is%20the%20most,within%2010%20to%2015%20minutes.