How hot can a raging conflict get? Some may not want to consider the full range of possible answers to that question, but rapidly developing events in and around Russian-occupied Crimea point to a heatwave of sorts in the long-simmering war in Ukraine. 

Ukraine said its forces shot down Russian drones and cruise missiles targeting the Black Sea port of Odessa before dawn Tuesday in what Moscow called “retribution” for an attack that damaged a crucial bridge to the Crimean peninsula.

The Russians first sought to wear down Ukraine’s air defenses by firing 25 exploding drones and then targeted Odessa with six Kalibr cruise missiles, the Ukrainian military’s southern command said.

All six missiles and the drones were shot down by air defenses in the Odessa region and other areas in the south, officials said, though their debris and shock waves damaged some port facilities and a few residential buildings and injured an elderly man at his home.

The Russian defense ministry said its “strike of retribution” was carried out with sea-launched precision weapons on Ukrainian military facilities near Odessa and Mykolaiv, a coastal city to the northeast.

It destroyed facilities preparing “terror attacks” against Russia involving maritime drones, including a facility at a shipyard that was producing them, the ministry said. It added that it also struck Ukrainian fuel depots near the two cities.

It was not possible to verify the conflicting claims by both countries.

President  Putin blamed Ukraine on Monday for striking the Kerch Bridge, which links Russia with Crimea and was attacked in October 2022 and needed months of repairs. The bridge is a key supply route for the peninsula, which was illegally annexed by Moscow in 2014.

Ukrainian officials stopped short of directly taking responsibility, as they have done in similar strikes before, but Ukraine’s top security agency appeared tacitly to admit to a role.

Satellite images taken Monday by Maxar Technologies showed serious damage to both eastbound and westbound lanes of the bridge across the Kerch Strait on the part nearest to the Russian mainland, with at least one section collapsed. The railroad bridge that runs parallel to the highway appeared undamaged.

The Russian military has sporadically hit Odessa and the neighboring region throughout the war, but Tuesday’s barrage was one of the biggest attacks on the area.

Ukrainian forces have been targeting Crimea with drones and other attacks. Kyiv has vowed to reclaim it from Russian control, arguing that the peninsula plays a key role in sustaining the Russian invasion and is a legitimate target.

The onslaught also came a day after Russia broke off a deal that had allowed Ukraine to ship vital grain supplies from Odessa during the war Moscow said the decision was in the works long before the bridge attack.

Even so, the Kremlin spokesman, Dmitry Peskov, alleged, without offering evidence, that the specific shipping lanes and routes used for the grain transport under the deal were abused by Ukraine.

“Our military has repeatedly said that Ukraine has used these grain corridors for military purposes,” Mr. Peskov told reporters.

President Zelensky has said Ukraine will continue implementing the grain deal. Mr. Peskov warned that such action was risky because the region lies next to an area where there is fighting.

“If they try to do something without Russia, these risks must be taken into account,” Mr. Peskov told reporters.

Mr. Zelensky said grain exports by sea and port security topped the agenda of his meeting Tuesday with senior military commanders and top government officials, adding that he received reports on logistics and protection of the coastal regions.

The United Nations and Ukraine’s Western allies slammed Moscow for halting the Black Sea Grain Initiative, saying it put many lives in peril.

USAID is giving Ukraine a further $250 million to support its agricultural sector as its chief, Samantha Power, visited Odessa and chided Moscow for its stance.

“Russia’s disruption of maritime commerce since the beginning of its full-scale invasion, including blockading ports, delaying ship inspections, and, most recently, withdrawing from the Black Sea Grain Initiative, has severely choked the amount of grain Ukraine is able to provide to the world amid a global food crisis,” a USAID statement said.

The Kremlin said the agreement would be suspended until Moscow’s demands to lift restrictions on exports of Russian food and fertilizer to the world are met. 

Mr. Peskov on Tuesday reaffirmed an earlier Kremlin pledge to provide especially poor countries in Africa with grain for free, adding that the issue will be discussed at a Russia-Africa summit in St. Petersburg next week.

Meanwhile, the Russian defense ministry also said its forces had foiled a Ukrainian attack on Crimea using 28 drones.

The ministry said 17 of the attacking drones were shot down by air defenses and 11 others were jammed by electronic warfare means and crashed. It said there was no damage or casualties.