So the Company which has the fire in Houston has a record of releasing Benzene, a known Cancer Causing agent, into the atmosphere before.

https://grist.org/article/air-pollution-from-harvey-was-bad-this-houston-petrochemical-fire-is-worse/

The fire broke out Sunday morning at Intercontinental Terminals Company’s facility in Deer Park, a heavily industrialized area about 15 miles southeast of Houston. ITC, as it’s known, has a long history of flouting environmental rules. According to EPA data, it has violated federal clean water rules nine times in the last three years. Since 2005, the state has found Intercontinental Terminals in violation of its permits at least nine times, resulting in roughly $70,000 in fines.

The TCEQ, the agency responsible for protecting the state’s environment and public health, has been criticized for letting large corporate polluters off with a slap on the wrist. An analysis of its enforcement record by an environmental nonprofit found that the agency imposed penalties on violators in just 3 percent of cases. ITC appears to have benefitted from the lax enforcement. In 2016, for instance, the company released more than 1,500 pounds of benzene — a carcinogenic chemical — for over five days and failed to notify the state agency within the mandated 24-hour deadline. The fine: roughly $4,000.

https://www.houstonpublicmedia.org/articles/news/2019/03/19/325683/five-tanks-at-petrochemical-facility-are-still-on-fire-no-timetable-on-when-incident-will-end/

Updated on Tuesday March 19, 2019, at 5:30 p.m.

Eight of the 15 tanks at the Deer Park petrochemical facility where a massive fire erupted on Sunday were still on fire as of Tuesday afternoon, the company that owns the facility said at a news conference.

...

High altitude of smoke plume is good

Earlier on Tuesday, Harris County Judge Lina Hidalgo held a news conference and said the smoke plume caused by the fire is at approximately 4,000 feet of altitude, putting it high enough to prevent exposure to dangerous chemicals in the air. The weather forecast indicates winds will push the plume to the east and northwest across parts of Harris, Fort Bend and Waller counties.

Hidalgo said regional and local officials are examining all the data and assured they are “not in a position to raise further alarm.”

Houston Mayor Sylvester Turner also attended the news conference. He said at this time there’s no danger for residents but added the situation is “fluid.”

The City of Houston is using multiple air quality monitors, including ten that can detect benzene, a dangerous chemical that the Centers for Disease Control and Prevention (CDC) has linked to cancer. Those monitors are providing hourly readings and Turner said “if we detect that there’s any problem, any cause for alarm, we will be the first to let you know.”

Golly.. since they don't use Lead anymore.. or MTBE.. and they don't WANT to use Ethanol.. we're stuck with using these Aromatics.. and this is the result.

The Petroleum industry has some 'splaining to do..