At least 46 people have died over the past four days from torrential rains lashing the southern Indian state of Andhra Pradesh, with widespread destruction of homes, crops and roads.

A state government spokesman said Saturday 13 people had died in the past 24 hours, taking to 46 the number killed in landslides and building collapses since Tuesday in the coastal state.

Indian army helicopters supplied essentials to tens of thousands of marooned people as downpours inundated the region's largest airport in the state capital Hyderabad and damaged rail and road networks.

More than 62,000 people have been evacuated from the eight worst-affected districts, the spokesman said, adding that the rains had also collapsed communications and power cables and destroyed infrastructure in 125 villages.

The weather office predicted more rain in the next few days as the state government tried to reach areas cut-off by floods which have hit trade in Andhra Pradesh, one of India's largest seafood exporters.

Parts of the western states of Maharashtra and Gujarat are also facing heavy rains which experts say will result in bountiful crops this winter in agriculture-dependent India.