TEHRAN, Iran — A government-ordered public shutdown in some areas of Iran took place on Wednesday due to a scorching heatwave that has seen temperatures soar past 40 degrees Celsius (104 F), straining the power grid

Tehran's alert reflects growing fears of foreign intelligence infiltration amid ongoing tensions with Israel and the United States.

"The delegation will come to Iran to discuss the modality, not to go to the (nuclear) sites," Iran's Deputy Foreign Minister told reporters.

An Iranian navy helicopter confronted a U.S. warship attempting to approach Iranian territorial waters in the Gulf of Oman on Wednesday, Iranian state TV reported.

Iran has agreed to allow a technical team from the U.N. nuclear watchdog to visit in the coming weeks to discuss "a new modality" on relations between the International Atomic Energy Agency and Tehran,

Protests have erupted for a second night in the Iranian city of Sabzevar, as residents took to the streets over prolonged electricity and water outages during a record-breaking heatwave

For weeks, fires and explosions have been reported almost daily in Iran. Officials are investigating what they think is a coordinated campaign.

"US destroyer 'Fitzgerald' attempted to approach waters under Iran's monitoring in a provocative move," Iranian state TV said.