Millions of people from the middle of the country to the East Coast will feel the effects of very dangerous heat levels from now through next week’s 4^th of July holiday weekend. The American Red Cross reminds everyone that this kind of extreme heat is dangerous ─ the leading cause of weather-related deaths in the United States.

Temperatures across the region will range from around 90°F to the low 100s, with high humidity pushing the heat index to between 105°F and 110°F. Overnight lows will linger in the 70s, offering little relief from the heat. In northern parts of the affected area, many homes lack air conditioning, leaving residents especially vulnerable to these conditions. The timing is especially challenging as the 2026 FIFA World Cup continues, driving unprecedented activity in many major U.S. cities.

The Red Cross is monitoring the situation and preparing to respond if necessary. Find cooling centers or shelter locations on redcross.org, the free Red Cross Emergency app or by calling 1-800-RED CROSS (800-733-2767). You can also follow your local Red Cross or emergency officials on social media, sign up for free local government alerts or monitor local news.

WHAT YOU SHOULD DO The Red Cross recommends taking three steps in extreme heat ─ stay hydrated, stay cool and stay connected.

• Stay hydrated by drinking a cup of water every 20 minutes, even if you don’t feel thirsty. Avoid sugary, caffeinated and alcoholic drinks.
• Stay cool by spending time in air-conditioned places. If your home is too hot, go to a mall, library or cooling center.
• Stay connected by checking on others and asking for help if you need it.

Don’t forget your furry friends. Visit here to find heat safety steps for your pets.

KNOW THE SIGNS OF HEAT ILLNESS Extreme heat can make anyone sick and it’s critical to act fast. The Red Cross recommends learning the warning signs and knowing what to do so you can react quickly.

Some people are at higher risk of getting sick because their bodies have a harder time staying cool. This includes older adults, children, pregnant women, and people with chronic conditions or disabilities. Individuals who take certain medications are at higher risk for heat related injury and illness and should consult their medical provider for guidance on managing their medication during periods of extreme heat. Athletes, outdoor workers and people without air conditioning are also at higher risk for heat illness.

• Heat cramps are an early sign of trouble and signaled by heavy sweating and muscle pain. Stop what you’re doing, rest in a cool place and drink a cup of water — or a sports drink — every 20 minutes. If you feel sick to your stomach, pause drinking. Get medical help if cramps last more than two hours or you have heart problems.
• Heat exhaustion is more serious and signaled by heavy sweating, weakness, cool and clammy skin, muscle cramps, dizziness, fainting, nausea or vomiting. Stop what you’re doing, rest in a cool place and drink a cup of water — or a sports drink — every 20 minutes. Loosen your clothes and place a cool, wet cloth on your body. Get medical help if you’re vomiting, don’t feel better in an hour, or if you have heart or kidney problems.
• Heat stroke is a deadly condition signaled by high body temperature, rapid heartbeat, confusion, headache, dizziness, fainting, nausea or vomiting. Take action by calling 911. Move to a cool place, remove extra clothing and use a wet cloth or a cool bath to cool down. If possible, sip a sports drink or water.

Here are more steps to help keep you safe as temperatures rise:

• Think about how you’ll stay cool. If you have air conditioning, make sure it’s working properly. Consider where you can go to cool off if the power goes out.
• If you don’t have air conditioning and your home becomes too hot, think about where you’ll go, how you’ll get there and what you’ll take with you.
• If you are older, pregnant, take medication or have a chronic condition or disability, your body may have a harder time cooling down during extreme heat. Talk to your doctor about how you can stay healthy.
• Make sure you have supplies to keep medication cool and equipment charged, especially during a power outage.
• If you’re an athlete, think about how you can alter your exercise schedule to avoid the hottest times of the day or work out indoors.
• If you work outdoors, find out if you can alter your schedule to avoid the hottest times of the day. Consider how you’ll stay hydrated and find a cool place to take breaks.
• Sign up for free emergency alerts from your local government to stay updated about heat waves and the location of open cooling centers.
• Make sure pets have access to fresh water and shade.