5 things to know for Aug. 13: Presidential race, Tropical Storm Ernesto, Earthquakes, Ukraine incursion, Middle East

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Climate change is turbo-charging summer temperatures across the US, but it’s most intense in major cities, where more than 260 million Americans live. That’s because buildings, roads and sidewalks radiate more heat than grass and trees in what’s known as the urban heat island effect —which can add as much as 20 degrees to city temperatures. Here’s what else you need to know to Get Up to Speed and On with Your Day. Former President Donald Trump spoke with Tesla CEO and X owner Elon Musk in a live conversation on the platform for over two hours on Monday night. Technical difficulties derailed the start of the interview by more than 40 minutes, creating a public stumble for the Trump campaign as it looks to regain momentum in the race. The former president eventually fielded friendly questions from Musk while slamming Vice President Kamala Harris’ stances on the economy and immigration. A CNN fact check found that Trump made at least 20 false claims during the conversation. Meanwhile, Democrats are gearing up for their national convention in Chicago next week, where Harris will formally accept her party’s nomination for president on Thursday night. Tropical Storm Ernesto has formed in the Atlantic and is racing toward the Caribbean and Puerto Rico with heavy rainfall, gusty winds and dangerous seas as a predicted hyperactive hurricane season ramps up. The fast-moving system will bring tropical storm conditions — including potentially damaging winds and heavy rainfall — to the Leeward Islands today. Those conditions are expected to spread across the Virgin Islands and Puerto Rico by the end of the day. Officials warn that the combination of rain and wind could cause issues for Puerto Rico’s vulnerable electrical infrastructure. Ernesto will not follow Debby’s continental US-bound path but will intensify into a hurricane over very warm ocean water, potentially placing Bermuda in harm’s way. A magnitude 4.4 earthquake occurred in Los Angeles at 12:20 p.m. PT on Monday, according to the US Geological Survey. The quake startled residents, rattled schools and interrupted several live and recorded shows. Monday’s shaking prompted the Los Angeles Fire Department to go into earthquake mode, with crews at 106 fire stations doing surveys of their districts. There were no reports of injuries or structural damage, the department said. Separately, much of western Japan is on high alert after a 7.1-magnitude quake hit the region last week. The government has lifted most advisories but many residents and officials are preparing for a potential emergency during what is normally peak travel season during summer holidays. Russian President Vladimir Putin promised to “kick the enemy out” of his country’s territory after it emerged that Ukrainian troops were in control of dozens of Russian villages a week into Kyiv’s surprise cross-border incursion. On Monday, Ukrainian military chief Oleksandr Syrskyi said that some 386 square miles of Russian territory were now under Ukrainian control. Putin went on to tell his security chiefs to expel the Ukrainian forces and “knock out the enemy from our territories.” Ukraine’s advances have sparked a large wave of evacuations from the border regions. Around 180,000 people had been told to evacuate and an estimated 121,000 have left already, according to Aleksey Smirnov, the acting head of the Kursk region.