"From Florida to Seattle, Washington, from Hawaii to New York, all over California and many, many states across the country, people will be taking to the streets over the next week to demand that the assets of BP be seized now," said Richard Becker, a member of the San Francisco, California, chapter of the group.
"We know millions of people are deeply concerned about what's going on in the Gulf right now, and we expect large numbers of people to come out to the protests."
Sentiment such as Becker's has seemed to grow as more oil from the underwater gusher has made its way to or near coastal areas of Louisiana, Florida and other Gulf Coast states.
U.S. Coast Guard Adm. Thad Allen, who is heading the federal government's response, said the real fix will be a relief well but that won't be working until August. He said authorities have been "relentless" with its oversight of BP's efforts and are making sure the company exhausts every possible method.