Six eastern Colorado counties are under a warning for high fire danger Saturday afternoon.
Firefighters are breathing smoke, which puts them at greater, potentially deadly, risk from COVID-19 coronavirus.
Over the past month, fighting Colorado's largest wildfires has cost millions of dollars.
Persistent heat waves and dry lightning are part of the problem. For firefighters, the erratic behavior gets dangerous quickly.
In just over three weeks, four fires in Colorado have burned about 190,000 acres, with no end in sight.
Drought conditions in Colorado continue to deteriorate as severe and extreme conditions expand on the western slope.
Buildings aren't the only things at risk in wildfires. Recent disasters in California have left local water system contaminated with toxic chemicals afterward, slowing return and recovery.
The combination of high temperatures and elevated levels of particles from a fire can affect even healthy lungs.
Four fires reported since July 31 in Colorado have burned more than 130,000 acres in hot, dry conditions.
Severe drought conditions have increased in western Colorado as fire have been raging in the area.