WASHINGTON - U.S. Vice President Joe Biden and British Deputy Prime Minister Nick Clegg said stability in flood-ravaged Pakistan is "vital" for stability around the world. In a statement issued by the White House on Thursday, the two leaders said the United States and Britain are "committed to ensuring the most effective possible international response to Pakistan's ongoing flood disaster." Noting that Britain has contributed $209 million and the United States has contributed $345 million to the relief effort, Biden and Clegg recognized "the generosity of individual citizens in these and other countries." "However, there is more to be done," the statement said. "To meet the targets of the (United Nations) humanitarian appeal and the upcoming World Bank Damage and Needs Assessment, we encourage the international community to respond fully, rapidly and with effective coordination and leadership. We encourage partners to meet in full pledges made at the 2009 Tokyo Donors meeting in addition to new pledges that are related to the floods." Biden and Clegg restated the U.S. and British "commitment to sustained long-term post-flood reconstruction in Pakistan, beyond the immediate humanitarian needs" and urged other nations to remain engaged in Pakistan long-term. "Stability in Pakistan, underpinned by economic and democratic development, is vital for the stability of the region and for security in the wider world," they said. The United Nations warned Thursday that more than 7 million people in parts of Pakistan's Sindh province are affected by flooding more than seven weeks after monsoon rains soaked the country. The U.N. Office for the Coordination of Humanitarian Affairs said more than 20,000 people are displaced daily in parts of Pakistan where the floodwaters continue to rise.