The screams. The bodies lying across the freeway. The people trying to run away from a toxic cloud before collapsing to the ground.<\/p>\n
Fifty years later, retired Houston firefighters say they still remember every detail from one of the deadliest disasters in Houston history.<\/p>\n
\u201cIt looked like a war zone,\u201d retired Houston firefighter Brad Rilay said.<\/p>\n
On May 11, 1976, a tanker carrying more than 7,000 gallons of anhydrous ammonia plunged off the 610 West Loop ramp and crashed onto the Southwest Freeway below.<\/p>\n
The impact ripped open the tanker, sending a massive cloud of toxic ammonia into the air during the middle of the morning rush.<\/p>\n
Seven people died.<\/p>\n
Dozens more were injured.<\/p>\n
And the disaster changed the Houston Fire Department forever.<\/p>\n
Rilay was only 20 years old when he responded to the scene.<\/p>\n
That morning had started like any other shift.<\/p>\n
Rilay said he and a district chief had just finished another call farther down the Southwest Freeway when dispatchers warned crews about a tanker crash involving ammonia near the West Loop interchange.<\/p>\n
As they drove toward the area, traffic completely locked up.<\/p>\n
Rilay said he ended up driving against traffic on the freeway shoulder just to reach the scene.<\/p>\n
When they arrived, he said the destruction was overwhelming.<\/p>\n
\u201cMan, it looked like a war zone, you know, the parts of the truck scattered everywhere, and the truck driver\u2019s body was lying in the middle of the road,\u201d Rilay said.<\/p>\n
The crash scene stretched across the freeway.<\/p>\n
Pieces of the tanker and destroyed vehicles were scattered throughout the interchange.<\/p>\n
Victims were already dying from exposure to the fumes.<\/p>\n
Rilay remembers immediately finding several people on the ground struggling to breathe.<\/p>\n
\u201cWe immediately came across three people, one man who had already died, and there were two who were struggling to breathe,\u201d he said.<\/p>\n
At the time, Houston firefighters had little training on hazardous material incidents and almost no specialized equipment to handle a chemical release that large.<\/p>\n
Firefighters grabbed an air pack from the chief\u2019s car and tried helping victims breathe through the mask.<\/p>\n
\u201cBut I don\u2019t know how much good that did,\u201d Rilay said quietly.<\/p>\n
What stayed with him most was the helplessness.<\/p>\n
\u201cYou know, have a brown mucus coming out of their mouth and their nose, and the feeling of not being able to help them,\u201d Rilay said.<\/p>\n
,As the ammonia spread across the freeway, drivers abandoned their vehicles trying to escape.<\/p>\n
Some never made it far enough.<\/p>\n
\u201cThe people who were forced to stop, they got out of the car and tried to get away from it,\u201d Rilay said. \u201cThey probably made it 25 or 30 feet before they collapsed.\u201d<\/p>\n
The toxic cloud moved unpredictably across the freeway interchange.<\/p>\n
Rilay described it as almost impossible to avoid.<\/p>\n
\u201cYes, when we got there, the big, huge white cloud was just above the West Loop,\u201d he said.<\/p>\n
The danger wasn\u2019t always visible.<\/p>\n
\u201cYou could be standing there trying to help somebody, and all of a sudden you couldn\u2019t breathe,\u201d Rilay said.<\/p>\n
Retired firefighter Bill Hand also responded to the scene that day.<\/p>\n
Hand was working out of Station 1 downtown and helping transport additional air bottles to crews already fighting to rescue victims on the freeway.<\/p>\n
By the time he arrived, much of the initial chaos had already unfolded.<\/p>\n
But he remembers unknowingly walking into what he called an \u201cinvisible shield\u201d of ammonia.<\/p>\n
\u201cIt was like bam,\u201d Hand said. \u201cI mean, it just sets you back.\u201d<\/p>\n
At the time, firefighters did not fully understand how dangerous anhydrous ammonia could become after a crash.<\/p>\n
\u201cWe really didn\u2019t know what to expect,\u201d Hand said.<\/p>\n
Years later, Hand would learn the chemical had expanded rapidly after the tanker ruptured.<\/p>\n
\u201cIt expands 800 times,\u201d Hand explained. \u201cSo you had 800 tank trucks of gas that went off the freeway.\u201d<\/p>\n
The disaster exposed major weaknesses in Houston\u2019s emergency response capabilities.<\/p>\n
Back then, Houston did not have a dedicated hazmat team.<\/p>\n
Firefighters responding that day were largely learning in real time while trying to save lives.<\/p>\n
\u201cWe didn\u2019t have a hazmat team,\u201d Rilay said. \u201cWe didn\u2019t have the equipment on the apparatuses and on the chiefs’ cars as they do now.\u201d<\/p>\n
The deadly crash became a turning point for the department.<\/p>\n
Hand later became one of the original members of Houston\u2019s first hazmat team after fire leaders pushed to improve chemical emergency response training.<\/p>\n
\u201cI was part of the original team,\u201d Hand said.<\/p>\n
Houston firefighters began training directly with petrochemical companies and industrial emergency response teams throughout the region.<\/p>\n
Hand said the department slowly built a specialized response program focused on chemical incidents, rescue operations, and firefighter safety.<\/p>\n
He spent the remainder of his career focused heavily on hazmat response and training.<\/p>\n
\u201cI really pushed for training,\u201d Hand said. \u201cThat\u2019s how much I believe in it.\u201d<\/p>\n
Houston Fire Department Chief Mu\u00f1oz says the lessons learned from the 1976 disaster helped shape the modern hazmat response system Houston uses today.<\/p>\n
\u201cOur hazmat teams are, I would consider them the best team in the country,\u201d Mu\u00f1oz told KPRC 2. \u201cThe training they do, the equipment we have, and of course, the support that we have.\u201d<\/p>\n
Today, Houston hazmat crews use specialized trucks, protective suits, air monitoring systems, chemical detection equipment, and advanced response protocols that firefighters in 1976 simply did not have access to.<\/p>\n
Mu\u00f1oz said departments from across the country often look to Houston\u2019s hazmat teams for training and guidance.<\/p>\n
Five decades later, both firefighters say the memories never disappeared.<\/p>\n
Rilay says every trip through the Southwest Freeway interchange brings him back to that day.<\/p>\n
\u201cI think about it every time I go through that intersection,\u201d he said.<\/p>\n
Both men say they hope people understand dangerous chemicals are still moving through Houston every day.<\/p>\n
And they warn drivers to stay alert around tanker trucks and chemical spills.<\/p>\n
\u201cDon\u2019t drive through vapor clouds,\u201d Hand said. \u201cOur freeways are jammed with people; there\u2019s a lot of hazardous materials out there.\u201d <\/p>\n
Copyright 2026 by KPRC Click2Houston – All rights reserved.<\/p>\n","protected":false},"excerpt":{"rendered":"The screams. The bodies lying across the freeway. The people trying to run away from a toxic cloud…\n","protected":false},"author":2,"featured_media":287956,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[40029,56,58,57],"class_list":["post-287955","post","type-post","status-publish","format-standard","has-post-thumbnail","category-houston","tag-ammonia","tag-houston","tag-houston-headlines","tag-houston-news"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/posts\/287955","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/comments?post=287955"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/posts\/287955\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/media\/287956"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/media?parent=287955"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/categories?post=287955"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/tags?post=287955"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}