Emergency services respond to reports of two people in difficulty in the sea near Thornton Cleveleys, Lancashire, at about 8.31pm. The reports describe a woman who is later pronounced dead and a man who is left fighting for his life after the incident in the water. Responders are called to the shoreline following concerns that both people had got into difficulty. The exact circumstances leading up to the incident are not fully detailed in the available reports. One account attributes the incident to an attempt to rescue a pet dog, though it is not independently confirmed in the provided information. Local emergency services coordinate efforts at the scene, and the man is taken for urgent medical care due to the severity of his condition. The incident prompts an emergency response from multiple agencies, and authorities establish the circumstances surrounding what happened in the sea. No further confirmed details about the identities of those involved or official findings are included in the provided excerpts.