Patna: Most districts, including Patna, witnessed a hot and humid day on Monday, with the mercury expected to rise further in the coming days. According to a bulletin issued by India Meteorological Department (IMD), the temperature is expected to rise by three to five degrees Celsius over the next 48 hours in most parts of the state, and remain unchanged thereafter.Meanwhile, no major change is likely to occur in the minimum temperature for the next three to four days. The IMD has also predicted isolated rainfall at one or two places in a few districts on Tuesday, whereas the north-western and south-western parts of the state are likely to remain dry. After this a spell of considerable rainfall is anticipated from Thursday, with north-eastern and south-eastern districts likely to receive moderate showers, according to the forecast.The weather department issued an alert for thunderstorm, along with lightning activity, for 27 districts, including Patna, Jehanabad, Gaya, Nalanda, Nawada, Sheikhpura, Lakhisarai, Begusarai, Khagaria, Bhagalpur and Munger, on Tuesday. The maximum temperature is likely to be around 34-36 degrees Celsius across the state on Tuesday and rise thereafter. The minimum temperature is expected to remain in the range of 28-30 degrees Celsius in most of the districts, and 26-28 degrees Celsius in south-western and north-eastern parts of the state.On Monday, the highest maximum temperature was recorded in Motihari at 37.8 degrees Celsius, whereas the lowest minimum temperature was recorded at 24.6 degrees Celsius in Valmiki Nagar. Light rainfall was recorded in Begusarai, Sheikhpura, Madhubani and Purnia districts.