Gujarat has already been hard-hit by the monsoon

It has warned that the rain in the north of the state has been so heavy that rivers are full up, and dam sluice gates will have to be opened.

Officials say that means the area around the city of Ahmedabad will now be under threat of flooding.

Other parts of South Asia also continue to be affected by monsoon flooding.

Devastation

In Pakistan, the British aid agency, Save the Children (SCF), has said that around 60,000 children have been left homeless by Cyclone Yemyin and the ensuing heavy rains.

It says the worst affected areas are the provinces of Sindh and Balochistan, where at least 250 people have been killed, 250,000 houses damaged and around 1.5 million people have been left homeless.

There is a shortage of clean water in Balochistan

SCF says that some families have lost everything and are living under trees with no food or clean drinking water.

"The lack of shelter, food and clean water combined with exposure to the hot and humid weather puts children in real danger," said SCF's Director of Emergencies, Gareth Owen.

"We are deeply concerned about the health and welfare of these children in Pakistan whose lives have been turned upside down by the floods."

Officials estimate that monsoon rainfall has killed around 770 people across India, Pakistan, Bangladesh and Afghanistan.

Aid agencies and government officials say they are still concerned about the number of displaced people in the Indian states of Rajasthan, Bihar, West Bengal and Orissa.

In West Bengal a week of heavy rainfall has devastated more than 9,000 villages in four districts, killing 45 people.

Officials say that although the waters are now receding, thousands of displaced people living in camps still require food and water which has to be brought to some areas by helicopter.