Instructions
Soak a flannel in cold water (or have one ready in the fridge) and/or put an ice back (covered with fabric to stop ice-burns). Apply to forehead, neck, back of head, face, wrists
Further information
Head cooling is used in surgery to prevent seizures, and some experiments have shown that this approach could have positive effects on seizures, and/or protecting the brain during a seizure.
References
https://clinicaltrials.gov/ct2/show/NCT00067210
https://www.sciencedirect.com/science/article/pii/S1059131120302867
Disclaimer
Please note this does not constitute medical advice, and any seizure rescue method you use should first be discussed with a relevant medical professional.