Technologies
This Free Heat Warning System Could Help You Prepare for Dangerous Summer Conditions
The risks of heat are only growing thanks to lasting heat waves, extreme nighttime temperatures and unusual humidity, like the current “corn sweat” in the Midwest.
A massive heat dome is gripping much of the US again this week, with the Midwest facing a brutal combination of scorching temperatures and stifling humidity due in part to so-called “corn sweat,” or the extra moisture crops release into the air. This added humidity is pushing heat indexes well above 100 degrees across parts of the Corn Belt and beyond, compounding the risks for millions under excessive heat warnings and advisories.
The extreme heat bearing down across the US this summer can have a serious impact on public health. Excess heat can exacerbate common health conditions, but it can also mess with your air conditioning, overheat phones and cause meltdowns for other tech. If you live in an area at risk for extreme heat, or know someone who does, you can sign up for a free alert system to help you prepare. The HeatRisk tool from the National Weather Service can send personalized warnings straight to your inbox, giving you advance notice when dangerously high temperatures are headed your way.
HeatRisk is free to use and you’ll want to keep tabs on it to avoid heat safety issues, such as heatstroke, dehydration or fatigue. Here’s how to use it and why you should.Â
Read more: This CDC Tool Can Help You Track Heat Risks on Trips and in Your Area
What is NWS HeatRisk?
NWS HeatRisk is a clickable map of the US, which is used to forecast extreme heat and assess the impact of that weather on public health. You can click anywhere on the interactive map and pull up a seven-day forecast of risk assessments for any city, town or area.Â
The threat assessment is built on a five-level system that’s color-coded for severity, with green representing little to no risk and magenta representing the highest risk. The map will display a seven-day forecast for anywhere in the country, along with the color of the health threat level.
The system also considers how unusual the heat is for your area, how long the heat is expected to last and how it could affect people who are more vulnerable, such as older adults, kids or outdoor workers.
Read more: Super Common Health Conditions Can Make a Heat Wave More Dangerous: Here’s How to Prepare
Threat colors
NWS HeatRisk has five levels, each with a different color that corresponds to the size of the health risk:
0: Green
According to the NWS tool, there’s little to no risk involved with the forecasted heat at the green level.
1: Yellow
At the yellow level, there’s a minor risk for people who are extremely sensitive to heat.
2: Orange
The orange level represents a moderate risk to the general public, with potential danger to health systems and heat-sensitive industries.
3: Red
Red means there’s a major risk to anyone without access to immediate cooling and hydration, with likely impacts to health systems and heat-sensitive industries.
4: Magenta
The most extreme level is magenta. It’s both a rare occurrence and one that’s of long duration, with no overnight relief and is likely to affect health systems, heat-sensitive industries and infrastructure.
How to sign up for heat risk alertsÂ
To get free heat warnings, go to Heat.gov, enter your ZIP code and sign up for email or text alerts. You’ll get daily updates when your area faces extreme heat levels that could pose a health risk.Â
Signing up for alerts is a quick step that could help you plan ahead, from adjusting outdoor activities to checking on family or neighbors, or just opting to stay hydrated and inside.
Other ways to track heat risks
Similar to NWS HeatRisk, a tool from the US Centers for Disease Control and Prevention called the HeatRisk Dashboard gives you a seven-day forecast to assess the potential health impact from extreme heat.Â
Data Explorer is another tool from the CDC’s Environmental Public Health Tracking Program, which offers further HeatRisk information and assessment resources for COVID-19 and other illnesses.
Read more: Here’s How to Keep Your Kitchen Cool (and Lower Your Energy Bill) During a Heat Wave
Why extreme heat warnings matterÂ
Summer 2025 has already been a scorcher in many parts of the country. It’s important to stay diligent since extreme heat is the deadliest weather hazard in the US, causing more deaths each year than hurricanes, floods or tornadoes.Â
The risks of heat are only growing. Heat waves are lasting longer, nighttime temperatures are staying high and unusual humidity — like the current “corn sweat” in the Midwest — can make it even harder for your body to cool down.
Staying informed is one of the easiest ways to protect yourself and your loved ones. Along with signing up for alerts, the CDC recommends learning the signs of heat-related illnesses, drinking plenty of water and never leaving children or pets in cars.
For more ways to stay safe this summer, check out CNET’s guide to the best portable AC units, tips for cooling down this summer and how to make your home more heat-resilient.
Technologies
Trump Maintains US‑Iran Negotiations Continue Amid Tehran’s Denials of Duplicity
President Trump insists that US‑Iran talks are ongoing despite Tehran’s denial of any negotiation plans, while warning that only a deal or total surrender will allow passage through the Strait of Hormuz. Conflicting statements from both sides have heightened uncertainty as the conflict enters its sixth month.
On Monday, President Donald Trump asserted that negotiations between the United States and Iran are still taking place, even after Tehran stated it has no intention of engaging in direct talks with Washington.
In a fiery Truth Social post, Trump labeled Iran’s leaders “unbelievably duplicitous,” claiming they are lying about ongoing peace talks “whether Iran wants to admit it or not.” He repeated his assertion that the United States completely controls the Strait of Hormuz, despite maritime traffic through the crucial route lingering at only a small fraction of pre‑conflict levels.
He wrote, “Nothing reaches Iran unless we allow it, and nothing will pass unless a deal—or total surrender—is achieved.”
Earlier that day, Iranian Foreign Ministry spokesperson Esmail Baghaei told reporters there is no imminent plan for U.S.–Iran negotiations, contradicting Trump’s earlier comment that talks would resume Monday afternoon. Baghaei added that Iran’s only current discussions are with Oman concerning the Strait of Hormuz.
The conflicting statements have heightened uncertainty over the peace‑talk process and the broader conflict, now in its sixth month.
Trump’s assertion about new negotiations came a day after he said on Truth Social that he had agreed to cancel a massive strike against Iran “subject to being able to rapidly make a DEAL.” He said in the same post that Iran and other Middle Eastern countries had asked him to hold off on that attack because “the perimeters of a deal has been agreed to.”
Trump has claimed dozens of times throughout the more‑than‑five‑month‑long war that a deal is at hand. No permanent deal has been signed, and a temporary ceasefire reached in June has fallen apart.
Trump has also repeatedly threatened to launch devastating strikes against Iran before backing off. After the latest example, oil prices on Monday fell and stocks surged.
BMI, a research unit of Fitch Solutions, said in a note Monday that a broader diplomatic understanding on reopening the Strait of Hormuz is still achievable this quarter, while raising the probability of its escalation scenario to 35% from 25%, citing mounting military, diplomatic and economic signs of rising U.S.-Iran tensions.
“Diplomatic progress is likely to be punctuated by periodic military flare-ups, while miscalculation by either side could trigger a renewed escalation,” BMI analysts wrote in a note. The firm said the key issue to watch is the future governance of the strait, as the Iran-Oman talks — potentially backed by Gulf states, China and the U.S. — point to efforts to build a post-conflict shipping framework.
Shipping risks persist even as diplomacy appears to be advancing. The United Kingdom Maritime Trade Operations Centre said it received a report of an incident 20 nautical miles (23 miles) northeast of Khasab, Oman — at the mouth of the strait — with a tanker’s master reporting an explosion in close proximity to the vessel at about 20:37 UTC Sunday (4:37 pm ET). The vessel and crew were safe and authorities are investigating, UKMTO said, advising ships to transit with caution.
The proposal Trump announced over the weekend calls for the U.S. and Iran to return to negotiations and continue ironing out some of the thorny issues that had derailed diplomatic efforts, according to The Associated Press, citing a regional official involved in the mediation efforts.
The official said the proposal also includes a reopening of the Hormuz Strait and halting attacks across the region, including by Iranian-backed militias in Iraq on the Arab Gulf countries and Jordan.
The U.S., for its part, will end its naval blockade on Iran and allow Tehran to export its oil, the official said, adding that no deal has been reached, although the mediation efforts remained underway.
Trump’s weekend reversal has lowered the temperature after days of escalating attacks across the Gulf. Kuwait said Saturday that Iranian forces launched a wave of drones within its airspace, with its military destroying multiple aircraft after Iran targeted critical infrastructure in the country’s north.
A parallel track with Muscat is also advancing. Iranian diplomats said Tehran was close to reaching a new arrangement with Oman to manage shipping through the Strait of Hormuz, a deal critical to preventing the war from escalating further, according to the Financial Times.
Iranian officials said negotiations over future management of the Hormuz Strait with Oman, which sits on the opposite shore of the waterway, are in their final stages. The agreed shipping route would be different from those used before, according to Iran’s Foreign Ministry spokesperson, Baghaei, adding that the new route was separate from the issue of the strait’s reopening or continued closure.
Technologies
Oil Prices Slide as Trump Halts Planned Iran Strike
Oil prices dropped after Trump cancelled a planned strike on Iran, with WTI down about 5% and Brent near 5% lower. He said the move followed requests from Tehran and regional allies for a pause while a deal shaping the Strait of Hormuz and Iran’s nuclear program is negotiated.
Oil prices fell on Monday after President Donald Trump announced he had cancelled a planned strike on Iran. WTI futures dropped roughly 5% to $80.34 a barrel, while Brent slipped about 4.7% to $83.77 a barrel.
Trump said early Sunday he called off the strike after Iran and several Middle Eastern nations asked him to hold off, noting that the outlines of a deal had been agreed upon. He added that the prospective accord would entail the immediate, full opening of the Strait of Hormuz and an end to Iran’s nuclear ambitions, according to his Truth Social post.
The president had been considering another round of strikes as diplomatic hopes waned since the conflict began on February 28. He said the U.S. and Iran would meet for talks on Monday, but Iran denied any scheduled negotiations with Washington, citing PressTV. Iran’s foreign‑ministry spokesperson Esmaeil Baghaei clarified that Tehran was only discussing shipping routes through the Strait of Hormuz with Oman. In a follow‑up Truth Social message, Trump insisted that, regardless of Iran’s acknowledgment, the United States is indeed discussing a solution to a long‑standing problem created by Iran.
Technologies
Oil Prices Drop as Trump Cancels Planned Attack on Iran
Oil prices fell sharply after President Trump announced the cancellation of a planned strike on Iran, citing a new deal that would open the Hormuz Strait and end Iran’s nuclear threat.
Oil prices fell sharply on Monday after President Donald Trump announced that he had called off a planned strike on Iran.
West Texas Intermediate futures, the U.S. benchmark, slipped roughly 5% to close at $80.34 per barrel, while Brent crude, the international benchmark, declined 4.7% to settle at $83.77 a barrel.
Trump made the announcement early Sunday, saying he had canceled the strike following requests from Tehran and other Middle Eastern countries.
In a Truth Social post, he wrote: “We have just been asked by Iran, and other Middle Eastern Countries, to hold off any attack in that the perimeters of a deal has been agreed to.”
The president indicated that the proposed agreement would include the immediate, complete, and total opening of the Hormuz Strait, as well as an end to Iran’s nuclear threat.
Trump had been weighing additional strikes amid diminishing prospects for a diplomatic resolution to the conflict that began on Feb. 28. He stated that the U.S. and Iran would hold negotiations on Monday.
Tehran denied that talks were planned with Washington, according to state news outlet PressTV.
Iran’s Foreign Ministry spokesman Esmaeil Baghaei said Tehran was only holding talks with Oman regarding the routes ships can use through the Strait of Hormuz.
In a subsequent Truth Social post, Trump added that whether “Iran wants to admit it or not, we are, in fact, talking of a solution to a problem that they have caused for decades.”
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