Nearly 600 firefighters battled the Camp Creek Fire near Portland's drinking water source — now officials warn a longer fire season means it could happen again.

Sacramento could see light rain Thursday morning before a sunny weekend and a fast climb toward 90-degree heat.

Ahmedabad, India, lands at the bottom of the 72-city list, while Phoenix ranks as the riskiest U.S. metro amid record heat.

Rain and fog give way to muggy heat, with thunderstorms possible later Thursday. A cooler, drier holiday weekend follows.

Louisville will hit 99 degrees Thursday as a Heat Advisory continues through Friday evening. Cooler, more manageable weather arrives Sunday.

Nashville is facing another triple-digit heat index Thursday as a Heat Advisory stretches through Friday evening. A slight weekend cooldown will not end the heat wave.

Oklahoma City faces a 98-degree Thursday and a Heat Advisory from 1 to 7 p.m. The near-100-degree stretch is expected to last through Labor Day.

A sunny Thursday gives downtown Los Angeles a break before rain chances, humidity and dangerous surf complicate Labor Day weekend.

San Jose starts Thursday with increased cloud cover as a weak front and possible showers move across the Bay Area. A warmer Labor Day weekend follows.

Miami starts Thursday clear and calm, but thunderstorms return by late morning. Rain chances rise through a stormy Labor Day weekend.

Minneapolis starts Thursday clear and humid before showers and thunderstorms move in. Heat returns Friday, while storm chances linger through Labor Day.

Atlanta is headed for a 96-degree Thursday with a heat index near 101. Weekend storms will bring some relief before a cooler, unsettled Labor Day.

San Diego gets a sunny, comfortable Thursday before showers and dangerous holiday weekend surf enter the forecast.