THIRUVANANTHAPURAM: Kerala will continue to receive isolated heavy rain till Monday due to the strengthening of easterly winds. India Meteorological Department (IMD) has warned that the rain is likely to be accompanied by thunderstorms and gusty winds with a wind speed of 30 to 40 km per hour. A yellow alert has been announced today in Thiruvananthapuram, Kollam, Pathanamthitta, Alappuzha, Kottayam, Ernakulam and Idukki districts. Fishing has been prohibited.