According to the National Weather Service, North Texas is likely to have heavy rain through Monday, especially along and north of Interstate 20.

Forecasts called for thunderstorms with brisk gusts and frequent lightning.

In North Texas, including the counties of Tarrant, Dallas, Denton, Collin, and others, the weather service has issued a flood watch. The watch remains in place until Monday at noon.

There won't be much of a break from the summer heat.

The most we can hope for this week is Monday and Tuesday's temperatures, which will be close to 80 degrees.

After that, the Seattle region is anticipated to have another wave of hot days. On Wednesday and Thursday, respectively, Seattle-Tacoma International Airport is expected to experience highs of 88 and 91 degrees.

Northern Texas tropical storm
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In advance of a "possible tropical cyclone" churning toward the Rio Grande, tropical storm warnings have been issued for South Texas and the Tamaulipas coastline in Mexico, as per The Washington Post.

As the Atlantic begins to stir after a month of sleep, heavy rain, strong winds, and a localized storm surge of a few feet are likely.

Parts of northern Mexico have already seen flooding, and another inch or two of precipitation is anticipated. Also coming ashore were the first showers from probable tropical cyclone 4 or PTC4.

There are tropical storm advisories in force from Port Mansfield, Texas, to Boca de Catan, Mexico.

Although PTC4 is predicted to weaken when it moves away from the coast late on Sunday or early on Monday, its true consequences won't be felt until the middle of next week.

Over Central Texas, southern Oklahoma, and Arkansas about that time, a profusion of rain may begin to fall, in some spots building to half a foot or more.

Other than that, there is a lot of shower and thunderstorm activity visible, and radar shows a scattering of heavy downpours moving closer to the coast. Additionally, the storm is exhibiting healthy outflow aloft, which is the high-altitude exhaust of "spent" air.

The storm is exhaling air from that location that has already heated energetically. Warmer, humid air can be inhaled from below as it exhales more. That encourages its upkeep or intensification.

Throughout this afternoon and into this evening, isolated to widely dispersed torrential downpours will pivot ashore in southern Texas and northern Tamaulipas.

There are no well-organized, uninterrupted spiral rain bands because the system is disorganized.

Instead, it's battling some mid-level dry air on the storm's northern half, which is reducing the amount of precipitation. Overall amounts will be decreased to an inch or two, at most, at least in South Texas.

Read more: Heatwaves, Crop Production Challenges Lead to "Heatflation"

Heatwave in Seattle
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Reid Wolcott, a meteorologist for the National Weather Service who coordinates warnings, predicts that the area would likely cool down over the weekend with a very slight probability of precipitation by Saturday, as per The Seattle Times.

But Wolcott warned that this respite might not last long.

He stated that there is a 50% probability that we would ramp up into another heat event on either Sunday or Monday of the following week.

Because the days are becoming shorter, Wolcott claims that the likelihood of experiencing temperatures in the mid-90s or even 100 degrees is "now getting less and less."

Even still, through at least September 3, there is a 70% likelihood that Seattle will experience temperatures above average.

We're not necessarily out of the woods for the risk of heat, as Wolcott put it.

Related article: Texas Braces for Incoming Tropical Storm Warning in Gulf of Mexico