Meth, the Forgotten Killer, Is Back. And It’s Everywhere.

The fight against methamphetamines was successful, but only to a point. In some states it’s now the leading cause of drug-related deaths.

PORTLAND, Ore. — They huddled against the biting wind, pacing from one corner to another hoping to score heroin or pills. But a different drug was far more likely to be on offer outside the train station downtown, where homeless drug users live in tents pitched on the sidewalk.“Everybody has meth around here — everybody,” said Sean, a 27-year-old heroin user who hangs out downtown and gave only...