Volunteers distribute water and food during a heatwave, at Grace Resources, an organisation helping people in need, in Lancaster, a charter city in northern Los Angeles County, California, U.S., August 4, 2021. REUTERS/Aude Guerrucci

People wait outside to receive hot meals at Grace Resources, an organisation helping people in need, in Lancaster, a charter city in northern Los Angeles County, California, U.S., August 4, 2021. REUTERS/Aude Guerrucci

Packs of food and water, ready to be distributed during the current heatwave, are stored at Grace Resources, an organisation helping people in need, in Lancaster, a charter city in northern Los Angeles County, California, U.S., August 4, 2021. REUTERS/Aude Guerrucci

Debra Simmons (R) and volunteers from the Shekinah Church prepare hot meals to be distributed at Grace Resources, an organisation helping people in need, in Lancaster, a charter city in northern Los Angeles County, California, U.S., August 4, 2021. REUTERS/Aude Guerrucci

Jeremy Johnson from Grace Resources brings a pack of water to a homeless encampment located north of Lancaster, a charter city in northern Los Angeles County, California, U.S., August 4, 2021. REUTERS/Aude Guerrucci

Jeremy Johnson from Grace Resources brings a pack of water to Aletha, during the current heatwave, who lives in a homeless encampment located north of Lancaster, a charter city in northern Los Angeles County, California, U.S., August 4, 2021. REUTERS/Aude Guerrucci

Debra Simmons (C) and volunteers from the Shekinah Church prepare hot meals to be distributed at Grace Resources, an organisation helping people in need, in Lancaster, a charter city in northern Los Angeles County, California, U.S., August 4, 2021. REUTERS/Aude Guerrucci

Large packs of water, ready to be distributed during the current heatwave, are stored at Grace Resources, an organisation helping people in need, in Lancaster, a charter city in northern Los Angeles County, California, U.S., August 4, 2021. REUTERS/Aude Guerrucci

Jeremy Johnson gives water to Fay during the current heatwave, at Grace Resources, an organisation helping people in need, in Lancaster, a charter city in northern Los Angeles County, California, U.S., August 4, 2021. REUTERS/Aude Guerrucci

Packs of food and water, ready to be distributed during the current heatwave, are stored at Grace Resources, an organisation helping people in need, in Lancaster, a charter city in northern Los Angeles County, California, U.S., August 4, 2021. REUTERS/Aude Guerrucci

Aletha stands next to a pack of water, during the current heatwave, that was just given to her at her homeless encampment located north of Lancaster, a charter city in northern Los Angeles County, California, U.S., August 4, 2021. REUTERS/Aude Guerrucci

A volunteer distributes water during a heatwave, at Grace Resources, an organisation helping people in need, in Lancaster, a charter city in northern Los Angeles County, California, U.S., August 4, 2021. REUTERS/Aude Guerrucci

An aerial view shows an homeless encampment during a heatwave, located north of Lancaster, a charter city in northern Los Angeles County, California, U.S., August 4, 2021. Picture taken with a drone. REUTERS/Aude Guerrucci

An aerial view shows an homeless encampment during a heatwave, located north of Lancaster, a charter city in northern Los Angeles County, California, U.S., August 4, 2021. Picture taken with a drone. REUTERS/Aude Guerrucci

A firefighting plane from Spain drops water to a wildfire near Koycegiz, Turkey, August 4, 2021. REUTERS/Umit Bektas

A man reacts as smoke rises from a wildfire near Koycegiz, Turkey, August 4, 2021. REUTERS/Umit Bektas

A firefighting plane from Spain drops water to a wildfire near Koycegiz, Turkey, August 4, 2021. REUTERS/Umit Bektas

A firefighting helicopter drops water to a wildfire near Koycegiz, Turkey, August 4, 2021. REUTERS/Umit Bektas

Locals watch a wildfire near Koycegiz, Turkey, August 4, 2021. REUTERS/Umit Bektas

A firefighting helicopter drops water to a wildfire near Koycegiz, Turkey, August 4, 2021. REUTERS/Umit Bektas

A firefighting plane from Spain drops water to a wildfire near Koycegiz, Turkey, August 4, 2021. REUTERS/Umit Bektas

Locals watch a wildfire near Koycegiz, Turkey, August 4, 2021. REUTERS/Umit Bektas

A man pauses as smoke rises from a wildfire near Koycegiz, Turkey, August 4, 2021. REUTERS/Umit Bektas

Locals watch as a firefighting plane from Spain drops water to a wildfire near Koycegiz, Turkey, August 4, 2021. REUTERS/Umit Bektas

A firefighting helicopter drops water to a wildfire near Koycegiz, Turkey, August 4, 2021. REUTERS/Umit Bektas

A man pours water on his face to cool off from hot weather in Skopje, North Macedonia August 3, 2021. REUTERS/Ognen Teofilovski

A man pours water on his face to cool off from hot weather in Skopje, North Macedonia August 3, 2021. REUTERS/Ognen Teofilovski

Co-leaders of Germany's Green party Robert Habeck and Annalena Baerbock, also candidate for chancellor of the Greens, listen to NABU association leader Christian Unselt as they take a walk at the moors of the Biesenthaler Basin nature reserve after presenting an immediate climate protection program in Biesenthal near Bernau, northeastern Germany August 3, 2021. Tobias Schwarz/Pool via REUTERS

Co-leaders of Germany's Green party Robert Habeck and Annalena Baerbock, also candidate for chancellor of the Greens, listen to NABU association leader Christian Unselt as they take a walk at the moors of the Biesenthaler Basin nature reserve after presenting an immediate climate protection program in Biesenthal near Bernau, northeastern Germany August 3, 2021. Tobias Schwarz/Pool via REUTERS

Co-leader of Germany's Green party Annalena Baerbock, also candidate for chancellor of the Greens, presents an immediate climate protection program at the Biesenthaler Basin nature reserve, in Biesenthal near Bernau, northeastern Germany August 3, 2021. Tobias Schwarz/Pool via REUTERS

Co-leaders of Germany's Green party Robert Habeck and Annalena Baerbock, also candidate for chancellor of the Greens, present an immediate climate protection program at the Biesenthaler Basin nature reserve, in Biesenthal near Bernau, northeastern Germany August 3, 2021. Tobias Schwarz/Pool via REUTERS

Co-leader of Germany's Green party Robert Habeck presents an immediate climate protection program at the Biesenthaler Basin nature reserve, in Biesenthal near Bernau, northeastern Germany August 3, 2021. Tobias Schwarz/Pool via REUTERS

Co-leaders of Germany's Green party Robert Habeck and Annalena Baerbock, also candidate for chancellor of the Greens, present an immediate climate protection program at the Biesenthaler Basin nature reserve, in Biesenthal near Bernau, northeastern Germany August 3, 2021. Tobias Schwarz/Pool via REUTERS

Co-leaders of Germany's Green party Robert Habeck and Annalena Baerbock, also candidate for chancellor of the Greens, present an immediate climate protection program at the Biesenthaler Basin nature reserve, in Biesenthal near Bernau, northeastern Germany August 3, 2021. Tobias Schwarz/Pool via REUTERS

Co-leader of Germany's Green party Annalena Baerbock, also candidate for chancellor of the Greens, presents an immediate climate protection program at the Biesenthaler Basin nature reserve, in Biesenthal near Bernau, northeastern Germany August 3, 2021. Tobias Schwarz/Pool via REUTERS

Co-leaders of Germany's Green party Robert Habeck and Annalena Baerbock, also candidate for chancellor of the Greens, present an immediate climate protection program at the Biesenthaler Basin nature reserve, in Biesenthal near Bernau, northeastern Germany August 3, 2021. Tobias Schwarz/Pool via REUTERS

Co-leaders of Germany's Green party Robert Habeck and Annalena Baerbock, also candidate for chancellor of the Greens, present an immediate climate protection program at the Biesenthaler Basin nature reserve, in Biesenthal near Bernau, northeastern Germany August 3, 2021. Tobias Schwarz/Pool via REUTERS

Co-leaders of Germany's Green party Robert Habeck and Annalena Baerbock, also candidate for chancellor of the Greens, present an immediate climate protection program at the Biesenthaler Basin nature reserve, in Biesenthal near Bernau, northeastern Germany August 3, 2021. Tobias Schwarz/Pool via REUTERS

Co-leaders of Germany's Green party Robert Habeck and Annalena Baerbock, also candidate for chancellor of the Greens, present an immediate climate protection program at the Biesenthaler Basin nature reserve, in Biesenthal near Bernau, northeastern Germany August 3, 2021. Tobias Schwarz/Pool via REUTERS

Co-leaders of Germany's Green party Robert Habeck and Annalena Baerbock, also candidate for chancellor of the Greens, take a walk at the moors of the Biesenthaler Basin nature reserve after presenting an immediate climate protection program in Biesenthal near Bernau, northeastern Germany August 3, 2021. Tobias Schwarz/Pool via REUTERS

Co-leaders of Germany's Green party Robert Habeck and Annalena Baerbock, also candidate for chancellor of the Greens, take a walk at the moors of the Biesenthaler Basin nature reserve after presenting an immediate climate protection program in Biesenthal near Bernau, northeastern Germany August 3, 2021. Tobias Schwarz/Pool via REUTERS

Co-leaders of Germany's Green party Robert Habeck and Annalena Baerbock, also candidate for chancellor of the Greens, take a walk at the moors of the Biesenthaler Basin nature reserve after presenting an immediate climate protection program in Biesenthal near Bernau, northeastern Germany August 3, 2021. Tobias Schwarz/Pool via REUTERS

A shadow of a firefighting helicopter is cast on the ground during a wildfire near Marmaris, Turkey, August 3, 2021. REUTERS/Umit Bektas

A firefighting helicopter drops water as smoke rises from a wildfire near Marmaris, Turkey, August 3, 2021. REUTERS/Umit Bektas

A firefighting helicopter flies through a wildfire near Marmaris, Turkey, August 3, 2021. REUTERS/Umit Bektas

A wildfire is seen from a firefighting helicopter near Marmaris, Turkey, August 3, 2021. REUTERS/Umit Bektas

Technicians make the last checks before a firefighting helicopter takes off for a wildfire near Marmaris, Turkey, August 3, 2021. REUTERS/Umit Bektas

A technician makes the last checks before a firefighting helicopter takes off for a wildfire near Marmaris, Turkey, August 3, 2021. REUTERS/Umit Bektas

A firefighting helicopter carries water to drop during a wildfire near Marmaris, Turkey, August 3, 2021. REUTERS/Umit Bektas

A car stands amongst the smoke from the Dixie Fire along Bucks Lake Road, Meadow Valley, California, U.S., August 1, 2021. REUTERS/David Swanson TPX IMAGES OF THE DAY

Smoke from the Dixie Fire hangs along Bucks Lake Road, Meadow Valley, California, U.S., August 1, 2021. REUTERS/David Swanson

A person walks next to vehicles amongst the smoke from the Dixie Fire along Bucks Lake Road, Meadow Valley, California, U.S., August 1, 2021. REUTERS/David Swanson

Smoke from the Dixie Fire hangs over water, along Bucks Lake Road, Meadow Valley, California, U.S., August 1, 2021. REUTERS/David Swanson

Smoke from the Dixie Fire hangs amongst the trees along Bucks Lake Road, Meadow Valley, California, U.S., August 1, 2021. REUTERS/David Swanson

Smoke from the Dixie Fire hangs amongst the trees along Bucks Lake Road, Meadow Valley, California, U.S., August 1, 2021. REUTERS/David Swanson

A tank of Phos-Chek is blanketted by smoke from the Dixie Fire hanging along Bucks Lake Road, Meadow Valley, California, U.S., August 1, 2021. REUTERS/David Swanson

Smoke from the Dixie Fire hangs along Bucks Lake Road, Meadow Valley, California, U.S., August 1, 2021. REUTERS/David Swanson

A man enjoys an ice cream cones during the summer's second heat wave in The Dalles, Oregon, U.S., July 31, 2021. Picture taken July 31, 2021. REUTERS/Maranie Staab

The sun sets amidst the summer's second heat wave in the Colombia RIver Gorge, Oregon, U.S., July 31, 2021. Picture taken July 31, 2021. REUTERS/Maranie Staab

The streets are empty during the summer's second heat wave in The Dalles, Oregon, U.S., July 31, 2021. Picture taken July 31, 2021. REUTERS/Maranie Staab