The bridge on Mumbai-Goa Highway had collapsed near Mahad, about 170 km from Mumbai, on Tuesday.
Nine bodies have so far been fished out as massive multi- agency operations continue to find the missing vehicles and rest of the passengers.
Earlier this morning, a 300-kg magnet was lowered in the waters with the help of a crane to trace the missing buses.
An NDRF jawan, who came out of the river after three hours of intense search, said, "The fast flow of flood water is posing a tough challenge for us but that is not going to be a deterrent in our mission."
More From This Section
Chief Minister Devendra Fadnavis announced a judicial probe into the incident.
In other Maharashtra districts, while rains spared Nashik after incessant downpour over the past few days, moderate to heavy rainfall disrupted normal life in Kolhapur, filling small dams almost to capacity.
In New Delhi though there was no rainfall, it was a humid day with the mercury settling at 36.7 degrees Celsius, three notches above the normal.
The flood situation continued to be grim in Bihar where the death toll mounted to 64 with over 33 lakh people in 13 districts still affected.
Purnia has witnessed 26 fatalities, followed by 15 in Katihar and eight in Supaul.
Meanwhile, the flood situation in Assam improved considerably, though nearly three lakh people are still reeling under its impact in 10 districts. Close to eight lakh people were affected across 638 villages till yesterday.
Flood-like situation was witnessed in Sambalpur city in the western part of the state which recorded highest rainfall of 240 mm. Rain water gushed into houses.
Rajasthan has recorded excess rains with 20 of its 33 districts receiving more than normal rainfalls so far this monsoon.
Average rainfall in the state from June 1 to August 3 is 267.05 mm but this year during the corresponding period the state has recorded 360.45 mm rain, nearly 35 per cent higher thanthe average.
Diamond Harbour and Digha in the coastal area near Bay of Bengal received the highest rainfall in the state at 17.8 mm and 17.2 mm.