Twelve homeless and formerly homeless volunteers are in Joplin to assist with the cleanup effort. The group also brought donated goods.
Officials have told residents in northwestern Missouri to be ready to evacuate in the next couple of weeks.
Statistics provided by the National Weather Service's Storm Prediction Center track the location and death count of all fatal tornadoes in the U.S. since 2000.
The Environmental Protection Agency has yet to discover serious pollution issues in the tornado's wake, but a systematic assessment of the impact is not complete.
Rescue workers continue to search Joplin for survivors in the face of diminishing odds.
The president spoke at a memorial service for tornado victims on Sunday after touring the destruction.
Reporter Eliza Smith, a Joplin native, reflects on the tornado's aftermath and President Obama's visit.
People lined the streets in Joplin as President Barack Obama came to survey the destruction and speak at a memorial service on Sunday.
Joplin's death toll following the deadly tornado is on the rise, and families continue to search for missing loved ones. After incidents of mistake identification, authorities are using DNA tests and dental records to assist them.
Joplin's death toll is now at least 142, with 100 still missing.
Crews continue search-and-rescue efforts while the state tries to confirm victims' identities. The tornado had an EF-5 rating, which designates storms with 200 mph winds, and killed at least 142 people.
Bleu Restaurant and Wine Bar, D. Rowe’s and Harpo’s planned special events that will give their customers a chance to help.
Joplin residents adjust to life after the devastating tornado, while beginning the arduous process of rebuilding their home.
Authorities said they believed many of the missing were alive and safe but simply hadn't been in touch with friends and family, in part because cell phone service has been spotty. There are still 156 people unaccounted for in the tally.
Joplin's largest employers were destroyed by the tornado, but the city is determined to retain jobs.
On Thursday, the state said 232 people are still considered "unaccounted for" in Joplin, and that some of those are among the 126 people killed by the storm.
The search continues for those on the Joplin missing list. Authorities believe most people on the list are alive but haven't been able to get in touch with family and friends.
Gov. Nixon signed three orders that will aid victims of the Joplin tornado.
A list of names of people who are still missing was released Thursday morning and has been posted online. Officials said 232 people are unaccounted for.
The Nuclear Regulatory Commission deemed equipment and storage areas at the Wolf Creek nuclear plant, which is 150 miles from Joplin, un-secure weeks before the Joplin tornado.