The goal of this clinical trial is to test the cooling effect of cooling blanket in patients with heat stroke. The main questions it aims to answer are: * the cooling rate of cooling blanket in patients with heat stroke * the relationship between cooling blanket and outcomes in patients with heat stroke Participants will accept the cooling blanket or non-cooling blanket according to the randomization group. Researchers will compare cooling rate and outcomes to see if the cooling blanket can accelerate the cooling speed and improve the prognosis of patients in heat stroke.