TRINIDAD, Bolivia (AP) – An American cargo plane delivered medicine and supplies Monday to Bolivia’s flood-ravaged eastern lowlands, yet American aid was dwarfed by a $15 million pledge from regional rival Venezuela.

Venezuelan President Hugo Chavez is planning a tour Saturday of the flooded areas, where a rainy season supercharged by El Nino has killed 41 people, driven thousands from their homes and triggered an outbreak of dengue.

International aid continues to arrive in Trinidad, whose outlying neighborhoods have been underwater for weeks. Bolivian officials warned Monday that floodwaters would continue to swell rivers on their way toward the Amazon.

The $1.1 million American donation included vaccinations, pumps, towels and fresh water, as well as cash to help repair the region’s washed-out highways and a donation to the local Red Cross branch. Monday’s delivery brings total American flood aid to $1.5 million.

But Venezuela’s socialist government has pledged $15 million in aid, sending a squadron of helicopters to deliver food to remote villages isolated by the floodwaters.

Since populist President Evo Morales took office last January, Chavez has dramatically stepped up aid to Bolivia, pledging more than a billion dollars for Bolivian petroleum projects, community radio stations and even a factory to make tea from coca leaves.

Mr. Morales travels the country in a borrowed Venezuelan helicopter, and the two countries in May signed a broad military cooperation pact.

In contrast, the American military presence in Bolivia has all but disappeared. The Bush administration’s 2008 budget proposal slashes American aid to Bolivia by more than 20.