Wall Street was poised to open lower Wednesday after the United States government's credit rating was cut for just the second time in history.

Futures for the Dow Jones industrials slipped 0.3% before the bell and futures for the S&P 500 tumbled 0.5%.

Drivers are in for another headache at the pump as U.S. gas prices continue to rise.

The national average for gas prices stood at about $3.78 a gallon on Tuesday — about 25 cents higher than that seen one month ago, according to motor club AAA. While today's prices at the pump remain far lower than they were last year, when energy costs soared worldwide in the months following Russia's invasion of Ukraine, experts say such a jump is unusual.

Ahmed Salah grew anxious when he heard the news that Russia had suspended a crucial wartime grain deal. The bakery owner in Egypt's capital is concerned it could mean global food prices soar.

"There mightn't be immediate impact," the 52-year-old said last week as he oversaw workers baking bread in his shop in Cairo, "but if they didn't find a solution soonest, things would be very difficult."

Russian drones on Wednesday hit a Ukrainian port city along the border with NATO member Romania, causing significant damage and a huge fire at facilities that are key to Ukrainian grain exports following the end of a deal with Russia that allowed Ukrainian shipments to world markets.

Since leaving the deal that allowed Ukraine to export through the city of Odesa, Russia has hammered the country's ports with strikes. In the past two weeks, dozens of drones and missile attacks have targeted the port of Odesa and the region's river ports, which are being used as alternative routes.

The glittering towers of the Moscow City business district dominate the skyline of the Russian capital. The sleek glass-and-steel buildings -- designed to attract investment amid an economic boom in the early 2000s – are a dramatic, modern contrast to the rest of the more than 800-year-old city.

Now they are a sign of its vulnerability, following a series of drone attacks that rattled some Muscovites and brought the war in Ukraine home to the seat of Russian power.

Russian troops hit port infrastructure in Ukraine's Odesa region with Shahed drones overnight, the Ukrainian military reported, damaging a grain elevator and causing a fire at facilities that transport the country's crucial grain exports.

Since leaving a deal that allowed Ukraine to export grain to world markets through the city of Odesa, Russia has hammered the country's ports with strikes. Since July 17, Russian forces have fired dozens of drones and missiles at the port of Odesa and the region's river ports, which are being used as alternative routes.

Tunisian President Kais Saied sacked Prime Minister Najla Bouden without explanation Tuesday night and replaced her with former central bank executive Ahmed Hachani, whom he tasked with overcoming the "colossal challenges" facing the cash-strapped North African country.

No official explanation was given for Bouden's dismissal, but several local media outlets highlighted Saied's displeasure over a number of shortages, particularly of bread in state-subsidised bakeries.

Russia pulled out of a deal brokered by the U.N. and Turkey to allow Ukraine's grain to flow during a global food crisis. It helped stabilize food prices that soared last year after Russia invaded Ukraine — two countries that are major suppliers of wheat, barley, sunflower oil and other food to developing nations.

Lebanon, Egypt -- the world's largest wheat importer, and other lower-income Middle Eastern countries like Pakistan worry about what comes next.

Energy giant BP said Tuesday that it earned nearly $2.6 billion in the second quarter, almost half what it posted in the first three months of the year as oil and natural gas prices that surged after Russia's invasion of Ukraine have fallen.

The company's underlying replacement cost profit, which excludes one-time items and fluctuations in the value of inventories, was down nearly 70% from the April-to-June period a year ago, when London-based BP brought in $8.45 billion.

Australia's central bank on Tuesday left its benchmark interest rate on hold at 4.1% for a second consecutive month raising expectations that rates might have reached their peak or are close to plateauing in the current cycle.

The Reserve Bank of Australia has hiked the cash rate 12 times from a record-low of 0.1% in May last year — as the board has attempted to rein in inflation — to a target range between 2% and 3%.