A playground outside the Prince Hall Village Apartments sits empty near one of the petrochemical facilities in Port Arthur, Texas, Monday, March 23, 2020. (AP Photo/David J. Phillip)

Juan Flores pauses while poses for a photograph while standing in a small park near a refinery along the Houston Ship Channel Monday, March 23, 2020, in Houston. Flores is working on a project to install air monitors at schools, not to warn children when the air was too bad to play outside, but alert them when plant emissions were low enough to make that safe. (AP Photo/David J. Phillip)

Homes are seen with The Valero Houston Refinery in the background on Monday, March 23, 2020, in Houston. The Texas Gulf Coast is the United States’ petrochemical corridor, with four of the country’s 10 biggest oil and gas refineries and thousands of chemical facilities. (AP Photo/David J. Phillip)

Activist Hilton Kelley poses along the railroad tracks that divide East and West Port Arthur Monday, March 23, 2020, in Port Arthur, Texas. "Now we may not drop dead that day," Kelley said of the environmental protection rollbacks, and the communities surrounding the refineries and plants. "But when you're inundated day after day...we're dead. We're dead." (AP Photo/David J. Phillip)

Juan Flores stands in small park near a refinery along the Houston Ship Channel Monday, March 23, 2020, in Houston. Flores is working on a project to install air monitors at schools, not to warn children when the air was too bad to play outside, but alert them when plant emissions were low enough to make that safe. (AP Photo/David J. Phillip)

The Motiva refinery, the largest oil refinery in North America, is shown Monday, March 23, 2020, in Port Arthur, Texas. The Texas Gulf Coast is the United States’ petrochemical corridor, with four of the country’s 10 biggest oil and gas refineries and thousands of chemical facilities. (AP Photo/David J. Phillip)

James Jackson fishes along the Houston Ship Channel Monday, March 23, 2020, in Houston. (AP Photo/David J. Phillip)

The Valero Port Arthur Refinery is shown Monday, March 23, 2020, in Port Arthur, Texas. The Texas Gulf Coast is the United States’ petrochemical corridor, with four of the country’s 10 biggest oil and gas refineries and thousands of chemical facilities. (AP Photo/David J. Phillip)

A woman walks her dog in Hartman Park next to the Valero Houston Refinery Monday, March 23, 2020, in Houston. (AP Photo/David J. Phillip)

Activist Hilton Kelley talks about the neighborhood where he grew up Monday, March 23, 2020, in Port Arthur, Texas. Kelley says he started speaking out for Port Arthur's black community when he got fed up "always hearing about someone dying of cancer, always smelling smells, watching little babies using nebulizers." (AP Photo/David J. Phillip)