While activity has ramped up in the Pacific Ocean over the last month, the Atlantic activity levels have been on the quieter side. Find out what factors could lead to an uptick in activity as the month goes on.

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An uptick in heat through midmonth will be followed by humidity as the monsoon kicks in later in July, keeping the risk for wildfires high. A high wildfire risk exists for much of the Southwest through this weekend and a very high risk for southeast Utah and southwest Colorado, where the largest wildfires are burning.

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The same heat dome driving dangerous temperatures will also steer severe thunderstorms into parts of the United States before and during the Independence Day weekend.

Also, a sunrise view in Yellowstone National Park showed snow still clinging to the mountains even as much of the U.S. swelters in summer heat.

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As dangerous heat builds, AccuWeather’s HeatWave Severity Index shows how duration and intensity can raise the risk of heat-related illness.

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More than a century after an asteroid exploded over Tunguska, astronomers are preparing for a new era of asteroid detection and planetary defense

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A major heat wave will grip close to three dozen states in the days leading up to the Fourth of July and could put millions at risk for heat-related illness.

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Millions of Americans will face a mix of heat, thunderstorms and wildfire smoke over Independence Day weekend, with weather threatening travel delays and outdoor celebrations across parts of the U.S.

Also, decades of whale photos helped researchers identify two humpbacks that moved between breeding grounds on opposite sides of the Southern Hemisphere, a rare crossing documented between Australia and Brazil.

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Warm Atlantic and Gulf waters, combined with the edge of a building heat dome, could allow storm clusters to organize into a tropical system as July begins.

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Extreme temperatures have contributed to deaths, prompted school closures and driven residents to cooling spots across France.

Also, conditions conducive for explosive and highly dangerous wildfire development will unfold later this week and persist through this weekend over a large part of the interior western United States.

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The tragedy underscores a critical danger that no one should ever take for granted. A vehicle can reach lethal temperatures within minutes. Every parent and caregiver needs to make hot vehicle safety a priority. Never leave a child unattended in a vehicle, even for a moment.

arts of the central and eastern United States will become as hot as a firecracker in the days ahead of Independence Day. Thunderstorms will provide some natural fireworks on the rim of a large building heat dome.

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The state of Illinois has already seen more tornado reports than it has in any year since records began, while "tornado alley" states are lagging behind this year in the annual tornado tally.

Also, a lake in Venezuela the size of Connecticut sits under constant thunderstorms for most of the year, making it the lightning capital of Earth.

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