epa12952056 A woman shields her face to provide relief during a heat wave, which is causing 'extreme temperatures' exceeding 40 degrees Celsius, in San Salvador, El Salvador, 12 May 2026. EPA/Javier Aparicio

epa12952058 A woman uses an umbrella for relief from a heat wave, which is causing 'extreme temperatures' exceeding 40 degrees Celsius, in San Salvador, El Salvador, 12 May 2026. EPA/Javier Aparicio

epa12952055 A view of the city center during a heat wave, in San Salvador, El Salvador, 12 May 2026. The Central American country is facing a heat wave that is causing 'extreme temperatures' exceeding 40 degrees Celsius. EPA/Javier Aparicio

epa12952054 A man is sells ice during a heat wave, which is causing 'extreme temperatures' exceeding 40 degrees Celsius, in San Salvador, El Salvador, 12 May 2026. EPA/Javier Aparicio

epa12952053 A woman drinks water to cope with a heat wave, which is causing 'extreme temperatures' exceeding 40 degrees Celsius, in San Salvador, El Salvador, 12 May 2026. EPA/Javier Aparicio