Stock futures open higher as S&P 500 tries to build on last week’s gains and reach all-time high

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Traders work during the closing bell at the New York Stock Exchange (NYSE) on March 17, 2020 at Wall Street in New York City.

Johannes Eisele | AFP | Getty Images

U.S. stock futures rose on Sunday night after Wall Street logged in its third consecutive weekly gain, but fell short of breaking the all-time high set on Feb. 19.

Dow Jones Industrial Average futures were up 48 points, or 0.2%. S&P 500 and Nasdaq 100 futures also traded higher by 0.2% each. 

The S&P 500 climbed 0.6% last week and the Nasdaq Composite advanced 0.1%. The Dow gained 1.8%

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California heatwave triggers power outages

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An intense multi-day heatwave kicked into high gear Friday, triggering power outages throughout California as the state’s power grid became overwhelmed by energy demands.

A Stage 3 emergency alert was declared around 6:30 p.m. by the California Independent System Operator, which runs the state’s power grid. The agency has not declared a statewide emergency of this kind since 2001.

More than 300,000 customers in both Northern and Southern California were without power at points Friday evening, according to one power outage tracker. By 10 p.m. power had been restored statewide.

Temperatures for some parts of the state are expected to

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Forty percent of U.S. Covid-19 tests come back too late to be clinically meaningful, data show

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In early July, Shannon Mayer started to feel a sudden tightness in her chest.

“The next day it was really hard to breathe,” the 31-year-old Chicago resident told CNBC. “I got scared.”

Mayer has asthma, but says she hadn’t had an issue with it for years. So she decided to get a test for Covid-19. The results, she was told, would take five to 10 days, and she was instructed to quarantine while she waited. After a week, the results still hadn’t been returned. And Mayer already felt better and suspected she wasn’t infected, so she stopped quarantining.

“Had I

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CDC guidance does not imply immunity to coronavirus for 3 months

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A pedestrian wearing a protective face mask walks past the Centers for Disease Control and Prevention (CDC) headquarters in Atlanta, Georgia, on Saturday, March 14, 2020.

Elijah Nouvelage | Bloomberg via Getty Images

The U.S. Centers for Disease Control and Prevention clarified on Friday that its updated quarantine guidance does not imply people who are infected with the coronavirus are immune to reinfection in the following three months, contradicting reports that said the agency’s guidance suggests otherwise. 

On Friday, it was reported that CDC guidelines on quarantining, which were updated on Aug. 3, indicate that people who are infected

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