Two wildfires, Willow Fire in Madera County and Cabin Fire in Tulare County, have prompted local air officials to issue a health cautionary statement for smoke impacts throughout the eight-county air basin: San Joaquin, Stanislaus, Merced, Madera, Fresno, Kings, Tulare and the Valley portion of Kern counties. Currently smoke impacts are concentrated in the mountainous and foothill areas of the air basin, but impacts on the Valley floor are possible until the fires are extinguished. Smoke from fires produces fine-particulate matter (PM2.5), which can cause serious health problems including lung disease, asthma attacks and increased risk of heart attacks and stroke.