More than 87 million Americans are currently residing in regions under a drought, with the majority of people concentrated in the southern and western parts of the country. In Nevada, water levels of Lake Mead have fallen to their lowest point in 80 years, and in Texas, the city of Houston is asking residents to voluntarily conserve water. Despite these severe conditions, cooler and wetter weather in the upper Midwest along with rainfall in the high plains region offers some hope for parched land and residents.

Two cars on a BART train heading toward San Francisco jumped the tracks Tuesday afternoon, and an initial assessment shows heat played the main role in the partial derailment.

The Contra Costa County Fire Protection District said the partial derailment happened near Hastings Drive and David Avenue in Concord around 5:30 p.m.

Overnight repairs reopened single-track service Wednesday morning, but minor delays of 5-15 minutes were still expected between Concord and Pleasant Hill, according to BART.

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