The India Meteorological Department has issued a red alert in Kozhikode, Wayanad, Kannur, and Kasargod districts in north Kerala, indicating the possibility of extremely heavy rainfall. An orange alert is in place in Thrissur, Palakkad, and Malappuram districts, where heavy to very heavy rainfall is expected.<br />''<br />''A yellow alert has also been issued in seven other districts of Kerala, including the state capital, Thiruvananthapuram.<br />''<br />''The Met Department said, isolated heavy rains accompanied by thunder and lightning are expected over the next four days under the influence of the cyclonic circulation over the state and the presence of a trough extending from North Kerala to Vidarbha.<br />''<br />''Fishermen have been advised not to venture into the sea.<br />