Many Texans have died because of the winter storm. Just how many won’t be known for weeks or months.

Photo does not have a caption

As snow blanketed much of Texas on Sunday, an 11-year-old boy in the Houston area gleefully played outside. Seeing the snow was a first for the boy, who came to the U.S. from Honduras two years ago with his mother, she told the Houston Chronicle.

Less than 24 hours later, as temperatures plunged to near single digits and homes across the state lost power, the boy died.

Early that same morning, a San Antonio man left his house for a dialysis appointment — but he never arrived. His wife found him unresponsive nearly two hours later in the frigid weather, according to KSAT. Local authorities said the man’s death could have been from exposure to the cold.

In Abilene, first responders found a 60-year-old man dead in his home on Wednesday. His wife, who was taken to a nearby hospital for treatment, said they hadn’t had power for three days. Fire department members told KTXS that it felt as cold inside the home as outside.

Across Texas, deaths related to the winter storm continued to mount this week amid freezing temperatures, widespread power outages and a scarcity of clean water. While there have been reports that dozens of deaths are tied to the storm in Texas, experts say the death toll is likely far larger. And it could be weeks or months before the true magnitude is known.

“It’s a slow process. We may have preliminary information in weeks, not days,” said Chris Van Deusen, a Texas Department of State Health Services spokesperson. A statewide survey of deaths caused by the storm is underway, he said. But the state won’t have a good indication until death certificates are filed.

A spokesperson for The Harris County Institute of Forensic Sciences, which conducts autopsies, could not provide the total number of deaths associated with the storm on Thursday, and had no idea when that information would be available.

Likewise in Travis County, a spokesperson estimated a tally of storm-related deaths could be available in 30 to 90 days.