As per the IMD alert, Thiruvananthapuram, Kollam, Pathanamthitta, Alappuzha, and Ernakulam districts may receive around 20 cm rainfall, while Kottayam, Idukki, Thrissur, Palakkad, Malappuram, Kozhikode, and Wayanad districts are expected to receive 15 cm rainfall on Friday. (Photo | B P Deepu, EPS)