Hundreds believed dead in heat wave despite efforts to help

The Sparks Lake wildfire burns in Kamloops, British Columbia, on Wednesday. (Courtesy of Marshall Potts Music via The Canadian Press via AP)

Salem Fire Department paramedics and employees of Falck Northwest ambulances respond to a heat exposure call Saturday during a heat wave in Salem, Ore. (AP Photo/Nathan Howard)

SALEM, Ore. — Many of the dead were found alone, in homes without air conditioning or fans. Some were elderly — one as old as 97. The body of an immigrant farm laborer was found in an Oregon nursery.