Mosquitoes have been the main carrier of the virus which has infected over 3,000 people (Creative Commons)

This is the highest recorded amount since September 2003, according to Reuters. Over 50 percent, or 1,816 cases are classified as neoroinvasive or brain-related diseases, which include meningitis or encephalitis. The remaining 1,729 cases are non-neuroinvasive. Nearly 400 cases have been reported in the last week.

This year's record-high out break may be attributed to  higher temperatures and fluctuations of rainfall, reported CBSNEWS.com. This made it a perfect environment for mosquitoes, increasing the West Nile outbreak.

Over 78 percent of the cases come from eight states: Mississippi, South Dakota, Michigan, California, Louisiana, Oklahoma, Illinois and Texas, said NBC.

About 38 percent of the reported infections have come from Texas alone. A total of 43 people have died from the West Nile Virus in Texas, the most in Texas history.

The California Department of Public Health said there are 165 people with the West Nile virus in 39 counties. Los Angeles has the highest recorded amount with 156.  The San Francisco reported first human case of the virus Wednesday, according to the San Franciso NBC-affliate.

More cases of West Nile have been reported this year than in all of 2003, according to the LA Times. As mid-October comes around, the CDC expects the total of number of infections to rise.

Read more coverage on the West Nile Virus here.

Reach Executive Producer Jerome Campbell here or follow him on Twitter.