"痱islation" is not a recognized word in the English or Chinese dictionary. In fact, it's not even a standard term used internationally. However, in terms of "seasonal heatstroke," this is a well-known term that refers to the condition where people experience severe heat and are at high risk of dehydration due to prolonged exposure to high temperatures. This situation often leads to serious health issues or death. The idea behind the term "seasonal heatstroke" is similar to the concept of "heat exhaustion, " which is more commonly known as "heat stroke." Both terms indicate a state where one experiences extreme heat and possibly sudden onset of heat-related illnesses due to prolonged exposure to high temperatures. I hope this explanation about "痱islation" helps clarify the meaning. If you have any other questions or need further clarification, feel free to ask!