From The Texas Tribune:
Texas heat-related deaths reached a two-decade high in 2022 amid extreme temperatures
A Texas Tribune analysis of state data found that at least 268 people in Texas were killed by heat last year, and a large portion of those deaths were likely migrants who died after crossing the border.
According to DSHS, non-residents can mean residents from another state or country. But the fact that counties on or near the Texas-Mexico border — including Webb County and Brooks County — have led the state in the number of heat-related deaths since 1999 suggests that they are largely migrants who died from heat-related causes while crossing the border.