Wildfire researchers watch an accessory dwelling unit burn during an experiment at the Institute for Business & Home Safety center on Thursday, April 16, 2026, in Richburg, S.C. (AP Photo/Erik Verduzco)

Wildfire researchers watch an accessory dwelling unit burn during an experiment at the Institute for Business & Home Safety center on Thursday, April 16, 2026, in Richburg, S.C. (AP Photo/Erik Verduzco)

Wildfire researchers and firefighters watch as an accessory dwelling unit burns during an experiment at the Institute for Business & Home Safety center on Thursday, April 16, 2026, in Richburg, S.C. (AP Photo/Erik Verduzco)

An accessory dwelling unit burns during an experiment at the Institute for Business & Home Safety center on Thursday, April 16, 2026, in Richburg, S.C. (AP Photo/Erik Verduzco)

The interior of an accessory dwelling unit sits at the Institute for Business & Home Safety center on Wednesday, April 1, 2026, in Richburg, S.C. (AP Photo/Erik Verduzco)

Lead carpenter David Trull ignites wood cribs for an accessory dwelling unit burn experiment at the Institute for Business & Home Safety center Wednesday, April 1, 2026, in Richburg, S.C. (AP Photo/Erik Verduzco)

A wildfire researcher walks in front of an accessory dwelling unit burning during an experiment at the Institute for Business & Home Safety center on Thursday, April 16, 2026, in Richburg, S.C. (AP Photo/Erik Verduzco)

King Philippe - Filip of Belgium (2nd L) tours the DEME environmental group during a visit on circular economy, recycling and the availability of land in Farciennes on April 21, 2026. The Belgian king is on a two-day interregional business visit to Flanders and Wallonia, organised with the Flemish and Walloon business networks VOKA and AKT, with 40 business leaders from both regions. (Photo by DIRK WAEM / Belga / AFP via Getty Images) / Belgium OUT