Rescuers searched Tuesday for about 10 people still missing in landslides and floods caused by more than a week of torrential rains in South Korea, as the country's military dispatched more than 10,000 troops to support rescue works.

The downpours pounding South Korea since July 9 have left 41 people dead, nine missing and 35 others injured. The rainfall has also forced about 12,780 people to evacuate and left about 28,600 households without power.

Extreme rainfall accompanied by deadly flooding hit the United States and several other countries over the weekend and last week.

There were several dozen fatalities in central and southern regions of South Korea, including the Chongju region where an underpass flooded and drowned motorists who became trapped in their submerged vehicles.

Pennsylvania authorities drew on 100 people, drones and cadaver dogs Monday in their search for two missing children whose family's car was swept away in flash flooding that ravaged the East Coast over the weekend. Other parts of the country endured threateningly high temperatures and severe air pollution from Canadian wildfires.

In eastern Pennsylvania, authorities described Monday's search for missing Matilda Sheils, 2, and her 9-month-old brother Conrad Sheils as a "massive undertaking" along a creek that drains into the Delaware River. The children are members of a Charleston, South Carolina, family that was visiting relatives and friends when they got caught in a flash flood Saturday.

Heat records are being shattered all over the world and the summer swelter keeps coming.

Around one-third of Americans are under some type of heat advisory, with the most blistering temperatures in the South and West, where even the regular simmer has turned up a notch.

Wildfires outside Athens forced thousands to flee seaside resorts, closed highways and gutted vacation homes Monday, as high winds pushed flames through hillside scrub and pine forests parched by days of extreme heat.

Authorities issued evacuation orders for at least six seaside communities as two major wildfires edged closer to summer resort towns and gusts of wind hit 70 kph (45 mph).

A firefighter died while battling a wildfire near his home community in Canada's Northwest Territories, authorities said Sunday.

The territorial government issued a statement saying the firefighter from Fort Liard died from an injury sustained while battling a nearby blaze Saturday afternoon.

Heavy rains pounded an already saturated Northeast on Sunday for the second time in a week, spurring another round of flash flooding, cancelled airline flights and power outages. In Pennsylvania, a sudden flash flood late Saturday afternoon claimed at least five lives.

Officials in Bucks County's Upper Makefield Township in Pennsylvania said torrential rains occurred around 5:30 p.m. Saturday in the Washington Crossing area, sweeping away several cars. At least five people died and two children, a 9-month-old boy and his 2-year-old sister, remained missing, authorities said.

Italian health officials intensified heat warnings as southern Europe began a brutally hot week on Monday with temperatures expected to top 40 C — or 104 F — on a continent already overburdened by tourists.

The health ministry issued 10 recommendations to protect elderly people, the sick and pets from the heat, urging people to stay indoors during the hottest hours, drink at least 1.5 liters (nearly half a gallon) of water a day and refrain from strenuous exercise at peak daylight times. The culprit was a high-pressure anticyclone dubbed Cerberus, the multi-headed dog that guards gates to the underworld in Greek mythology.

Heavy downpours lashed South Korea for a ninth day on Monday as rescue workers struggled to search for survivors in landslides, buckled homes and swamped vehicles in the most destructive storm to hit the country this year.

At least 40 people have died, 34 others are injured and more than 10,000 people have had to evacuate from their homes since July 9, when heavy rain started pounding the country. The severest damage has been concentrated in South Korea's central and southern regions.

Millions around the world have been seeking refuge from the scorching sun as climate change, a strong El Nino and summer in the Northern Hemisphere converge, toppling temperature records.

In Phoenix, temperatures have hit 110 degrees Fahrenheit (43 degrees Celsius) for around two weeks. Volunteers are helping residents, typically hardened by the desert's sweltering summers and insulated by air conditioning, that now need relief.