People of Bihar continued to shiver as chilly conditions prevailed for the second day on Wednesday, with the mercury plummeting further.
Trains and flights were affected due to poor visibility caused by dense fog, official sources said, adding people huddled together at bonfires lit by the district administration at various places.
Mercury in Patna dipped to 6° Celsius while Gaya, Motihari and Bihta experienced minimum temperatures of 5°, 5.2° and 5°, respectively.
Meteorological office sources said the mercury was going down steadily in several parts of the state.
Five persons have so far lost their lives.
Meanwhile, Patna zoo officials are using heaters, high-voltage bulbs and blankets to keep the animals warm.
All the cages have been covered with plastic sheets.