A photo and balloons memorialized 3-year-old Evan Brewer, who was found dead after his father had reported suspected abuse. (The Minnesota Star Tribune)

WASHINGTON – Spurred by high-profile cases of endangered children and chronically overworked caseworkers, many states have taken steps this year to shield children from abuse and neglect, including adding caseworkers, tightening reporting requirements and expanding the definition of "abuse."

Some states and cities are pouring more money into child protection agencies. In Texas, where the foster care system was declared unconstitutional by a federal judge in 2015, lawmakers allocated $4 billion this year, up 17 percent from the previous budget, to shore up the state's Department of Family and Protective Services, including hiring more caseworkers.

After the Star Tribune reported on child protection failures in Minnesota, Gov. Mark Dayton created a statewide child protection task force, and the Legislature approved $52 million for reforms.

In Florida, Tampa child welfare agencies got an additional $4 million in state funding to hire more social workers. And in New Mexico, following the rape and murder of a 10-year-old girl last year, officials in Albuquerque and Bernalillo counties tripled the funding they'd earmarked for a new child-abuse intervention program for at-risk families, to $3 million a year.

The plan is to create a safety net for children, said Katrina Hotrum, Bernalillo County's behavioral health director, one that includes services such as counseling and substance abuse treatment for parents who are not covered by Medicaid.

In other states, there is increasing pressure to act: In the wake of the high-profile deaths of several children in state custody, Kansas Gov. Sam Brownback in June signed a law that will form a task force to study the state's foster care system and make recommendations to overhaul it.

A 2016 audit found that the Kansas Department for Children and Family Services and private contractors failed to ensure the safety of foster care children and failed to investigate alleged abuse and neglect in a timely fashion.

In Montana, where the number of child abuse victims jumped from 1,100 in 2011 to 1,900 in 2015, Gov. Steve Bullock signed a law in April to create a commission to study child abuse. In May, he signed a law that requires the state's Department of Health and Human Services to create a plan to reduce the incidence of child abuse and neglect.

A 2016 report by the state's Children's Justice Bureau found that the state didn't have a consistent way to track reports child abuse and death. That year, 14 children died after multiple reports of abuse were filed to the state's child welfare system.

Pennsylvania's child welfare system has struggled for years to retain caseworkers and keep up with the demand of helping children and families in need. Earlier this month, the Pennsylvania Auditor General called that state's $1.8 billion child welfare system "appalling" and said it fails to protect children from abuse and neglect.

The report found that in 2016, there were 46 child abuse deaths and 79 "near fatalities," compared to 49 deaths and 70 near fatalities the year before. Nationwide an estimated 1,670 children died from abuse or neglect in 2015, the most recent year for which national data are available.

In recent months, Georgia, Indiana, Maryland, Oregon and Washington state also have enacted laws that either expand the definitions of abuse, establish new protocols for state investigations of child abuse, or require the publication of educational materials about who is mandated to report suspected abuse.

In some states, an uptick in child abuse cases has been the impetus for action.

In Massachusetts, where the number of child abuse victims increased from 20,300 in 2011 to 31,100 in 2015, lawmakers this year introduced several pieces of child abuse legislation. Among them were proposals to create a child neglect registry and to further define abuse and neglect of children.

During the same time period, the number of child abuse victims in Georgia jumped from 18,500 to 27,000. In May, Gov. Nathan Deal signed a law that expands the definition of child abuse to include sex trafficking.

Georgia lawmakers also introduced bills meant to strengthen child abuse laws, such as a proposal to revise procedures for how child mistreatment is investigated in custody cases.

Combating child abuse is a puzzle that has bedeviled states and localities for decades, said Tracey Feild of the Annie E. Casey Foundation, an advocacy and research organization that works with state, county and city agencies to revise their child welfare systems. Balancing the interests of protecting children at risk and keeping families intact can be difficult, Feild said.

Research has shown that adults who were abused as children can face mental and health issues. But removing children from the only family they know is traumatic as well, Feild said.

The number of minors in the child welfare system rose to 7.2 million in 2015, up from 6.6 million in 2014, according to data compiled by the U.S. Department of Health and Human Services. The number of children with cases deemed serious enough to merit an investigation by child protective services increased by 9 percent between 2011 and 2015.

Meanwhile, the number of child abuse deaths rose by 5 percent in 2015, the most recent year for which data are available. In some states, the opioid epidemic has contributed to an increase in foster care children.

But some child welfare researchers question the federal statistics on child abuse. They argue that it's impossible to get an accurate picture of child abuse rates because state definitions of abuse and neglect differ. In addition, many states have changed either their standards for reporting abuse or the technology they use to track their data.

High-profile cases of children who've been killed or seriously injured may have helped to boost the number of abuse reports.

As a result, child welfare caseworkers suffer from whiplash, said David Finkelhor, director of the Crimes Against Children Research Center at the University of New Hampshire.

"Every time a child dies or gets seriously injured, [caseworkers are] suddenly subjected to a huge amount of press scrutiny," said Finkelhor, who started to study child abuse and neglect issues four decades ago. "Someone wants to come in and reorganize everything and fire the scapegoats."