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Ontario’s minister for emergency preparedness has asked the federal government for help, including potentially deploying Canadian soldiers to the affected regions.

Monitor air quality, prepare to stay inside and pay close attention to people with chronic conditions.

Attribution science is advancing quickly, researchers said. That could support lawsuits seeking damages for severe events worsened by global warming.

Academics, city leaders and congressional lawmakers number among the thousands to urge the Trump administration to reconsider a plan to assert more control over grants.

Senator Thom Tillis of North Carolina made the stipulation during a Senate Judiciary Committee hearing on Thursday for witnesses to discuss Mr. Blanche’s nomination.

Mykhailo Fedorov defended his efforts to modernize the Ukrainian armed forces as thousands of people protested his dismissal.

Mr. Fedorov became the youthful face of Ukraine’s successful drone warfare program. The move to replace him has prompted street protests.

Our correspondent talked about the challenges of covering major news while under surveillance and filing his work without reliable internet access.

Someone used A.I. to write my biography. Thousands more of those books are polluting Amazon. Who is behind all this drivel?

Mr. Pelosi, the 86-year-old husband of former Speaker Nancy Pelosi, had at least eight traffic violations in one 13-year period before his crash this year, according to court records.

Federal investigators said a “crystal-like” substance in the bags looked like methamphetamine. A lawyer for the victim’s brother said it was salt.

At least one person has died, and emergency workers have rescued scores of people. Gov. Greg Abbott said the rain in the state was likely to break records.

A civil-rights investigation, which grew out of a 26-page memo by a political appointee, provides a road map for the White House’s assault on D.E.I.

Researchers have made important strides in understanding and treating diffuse midline gliomas, which were long seen as a death sentence for the children and adolescents they affect.

It’s the first potentially habitable world known to host an atmosphere, making it a lead contender in the search for life beyond our solar system.

An inventive $450 million center devoted to Roosevelt, who died in 1919, blends in with the natural beauty of North Dakota and celebrates conservation.

The president lacks not only a coherent strategic concept but an elementary understanding of what strategy is.

Kerry Sheron could often be found waving and nodding to those who passed his home, which stood out in Escondido, Calif.