HOUSTON, Texas (KTRK) -- Thirteen mayors from across Texas signed a letter with five reform measures they want to see state leaders address immediately in the wake of the tragedy in Uvalde.
In the note, they call on Gov. Greg Abbott to call a special session.
Mayors from San Antonio, Amarillo, Arlington, Austin, Corpus Christi, Dallas, El Paso, Fort Worth, Grand Prairie, Houston, Laredo, Plano, and Sugar Land signed it. All 13 are part of the Big City Mayors bipartisan coalition.
COMPLETE COVERAGE: Uvalde school shooting
"It was pretty much unanimous," Sugar Land Mayor Joe Zimmerman said.
In the letter, they outlined reforms they explicitly said: "would have prevented the shooters in El Paso and Uvalde from obtaining their weapons."
- Require universal background checks for gun purchases
- Increase the age to purchase assault weapons in Texas to 21
- Pass "red flag" laws to identify threats before shootings
- Significantly increase funding for mental health support
- Train and properly resource school safety officers
"It was just common sense for all of us," Mayor Zimmerman said. "You don't want to not do anything. In Sugar Land, one of the most important things we've had - administrations long before us - is (the title of the) safest city in America. Pretty hard to argue that you're really serious about being the safest city in America if you're not willing to address something like that."
SEE ALSO: Judge Lina Hidalgo calls on Gov. Greg Abbott to address youth gun violence
The letter speaks at length about mental health and Texas' 50th-ranked standing in the country for mental health care.
"Addressing gaps in mental health care access would require the state legislature to massively expand existing programs," the letter states. "This would mean more funding for school counselors, social workers, and support staff for public schools, as well as enhancing accessibility at our mental health authorities. The lack of statewide access for mental health services has caused our first responders, especially our police, to all too often to be the only response to a person in crisis."
The mayors agreed that enacting gun policies that allow firearms to be obtained easier makes the jobs of law enforcement more challenging.
RELATED: Mass shootings in the U.S. have nearly tripled since 2013, Gun Violence Archive data shows
Both Republicans and Democrats signed the letter urging the changes.
Mayor Zimmerman said they did not look at parties during their last meeting when they came up with the reform plan. Instead, he said they looked at what is best for their constituents and how to get there.
"My hope would be they would take a look at what we said, realize there's bipartisan support from across the state from local governments, and use it to more or less guide their hearings," Mayor Zimmerman said.
The letter was published on Monday, and Zimmerman said they have not heard from the governor.
ABC13 also reached out to Abbott's office but has not heard back.
Since the mass shooting in Uvalde, Mayor Zimmerman said the police chief of Sugar Land met with the police chiefs for both Lamar ISD and Fort Bend ISD, and officers have received additional training.
You can read the full letter below. If you have trouble seeing the document, you can access it here.
RELATED: 'We need to go in': Officers in Uvalde were ready with guns, shields, tools - but no clear orders
For more on this story, follow Mycah Hatfield on Facebook, Twitter and Instagram.